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vlada1
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RB800 big problem

Sat May 01, 2010 4:25 pm

Hi, Mikrotik Team

We have big problems with the temperature at the RB800, which reaches 60 degrees
routers we are working on 30-60% cpu my opinion, it is quite normal
I can not imagine how it will be when the outdoor temperature reaches 30 degrees
a router is canceled due to high temperature.
if a large number of cancellations, it is possible that we will file a lawsuit against the manufacturer because of poor preparation
to mention, any cancellation RB800 loss that we have to compensate customers
due to interruption of service that we provide them

I do not know just how much bigger heat sink on the processor?
2$ or 3$ more per board?
 
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marioclep
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Re: RB800 big problem

Sat May 01, 2010 4:49 pm

Try upgrading to RouterOS 5.0beta2. Changelog says: fixed RB800 temperature;

Regards
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vlada1
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Re: RB800 big problem

Sat May 01, 2010 8:20 pm

to say one more time RB800 ROUTERS STOP WORKING .
require the exclusion and inclusion of electricity every hour or breaks down

that shows the right temperature or not, but our teams were in locations where there are routers
RB800 reported that the router is too hot

to add a box in which there are routers with air, and is currently adding an additional two fans, but it is all bad if the manufacturer can not supply such equipment to be
but need to do more update
we use all models that mikrotik has to offer and we never had problems with overheating
 
aaa
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Re: RB800 big problem

Sun May 02, 2010 10:16 pm

What case you use?What wireless card you use?
 
Freqman
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Re: RB800 big problem

Fri May 07, 2010 5:14 pm

I have been having the same issues but no shutdowns yet. Have seen 1 go to 70c sitting by my desk in an enclosure.

I have 4 rb800s lined up. No wireless cards. sitting in open air 75* f room temp. Same firmware. Right out of the box. Why is there such a difference in temps diffs?

Is the temp sensor on the cpu or just somewhere on the board?
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normis
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Re: RB800 big problem

Mon May 10, 2010 8:26 am

RouterOS had problem properly displaying the actual temperature, upgrade to v4.9 and see then.
No answer to your question? How to write posts
 
aaa
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Re: RB800 big problem

Mon May 10, 2010 8:31 am

Yes, temp. sensor is inside CPU. Check your RB CPU load. On all RB800 CPU temperature must be very close.
 
Freqman
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Re: RB800 big problem

Tue May 11, 2010 3:09 pm

I thought the temp issue was on other version's of ROS (4.6) where it would just show 120c or something. Will upgrade all of them to 4.9 and sound off.

Thanks
RouterOS had problem properly displaying the actual temperature, upgrade to v4.9 and see then.
 
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Re: RB800 big problem

Sat May 22, 2010 9:21 am

i have some problem, no i throw my rb800. , use rb433AH most stable.

I was disappointed with the producen, who are not doing a lot of research on Rb800, such as overclocking Rb600


i'm not affraid / never mind if the admin give me - negatif Karma :shock:

respect the rights of the opinion, was disappointed. Do not jump to punish someone with neagtif karma.
 
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Re: RB800 big problem

Mon May 24, 2010 12:29 pm

I am running ROS 4.9 on RB800 with daughterboard 604 connected with six radios in a UT7 enclosure. Current tempreture outside is 18 C. CPU tempreture is 48C. Have had no problems yet.
 
aaa
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Re: RB800 big problem

Mon May 24, 2010 4:04 pm

In RouterOS 4.9 temperature is still higher like it is in reality. I have 46C few seconds after power on. I think it have some +16C offset. Same about voltage - RB show 41V , on RB power Jack I have 47V
 
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Re: RB800 big problem

Mon May 24, 2010 5:00 pm

Where are you using your RB 800? Is the weather cold? What is the temperature? Could you send you configuration?
 
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Re: RB800 big problem

Mon May 31, 2010 8:54 am

Do not jump to punish someone with neagtif karma.
karma is never given by the admin, or mikrotik staff. other users do it.
No answer to your question? How to write posts
 
mars
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Re: RB800 big problem

Wed Jun 02, 2010 12:56 pm

Hi

I installed an RB800 2 days ago. We are using a UT7 enclosure with 3 radio cards. When we started up it was around 18 degrees outside and the RB was was running at 65 degrees without any problems.

This morning however, the outside temperature went up to about 24 degrees, and the RB is now running at 73. We have started getting "extensive data loss" errors and the links keep dropping. I then have to reboot the RB to get the link back up again, but it only lasts a few minutes each time.

My current ROS is 5.0 beta 2, and my firmware is 2.26.

Does anyone have any suggestions? I ran the same setup with an RB600 before and had no issues.

Edit: not sure if it makes a difference, but my cpu is a e500v2.
 
mars
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Re: RB800 big problem

Thu Jun 03, 2010 11:42 am

no response
are we the only people having this problem
please be advised that these are working links and we cannot wait 3 weeks for an answer
thanks
 
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Re: RB800 big problem

Thu Jun 03, 2010 11:58 am

What wireless card you use? I am not sure that "extensive data loss" problem related with case inside temperature. Can you measure inside temp. with some weather thermometer with external sensor.
 
mars
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Re: RB800 big problem

Thu Jun 03, 2010 4:28 pm

no problems at 60 celsius for 1 day
75 c rb reset and have to wait for rb to drop down to 65 to work
we use a ut7 box with r5h and r52hn
this is definitely a temperature problem
Rb600 same cards,same box no problems
data loss only happens after 75c
i do not think the heatsink and small fan is enough cooling
this is a design problem
i have spoken to somebody else and he has the same problems

come on Normis we want answers
 
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Re: RB800 big problem

Sat Jun 05, 2010 4:37 am

mars,

I don't think it is a fan or heatsink problem.

I just looked at the data sheet on the CPU (Freescale MPC8544E) and the temperature range is 0C to 105C. I wouldn't think that the CPU would cause extensive data loss at 75C.

Just out of curiosity, have you tried underclocking it?

Drop it down to 667MHz or 400MHz and see if the problem goes away. The slowest Freescale MPC8544E is a 667MHz version. Maybe 800MHz is too fast for some of these CPUs.

The RB600 with similar family CPU was only running at 233MHz.

Tom
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mars
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Re: RB800 big problem

Sat Jun 05, 2010 10:19 am

thanks for the reply
i will try to drop the speed to 667 when it is 24c outside
if this is a cpu speed problem and only some chips can run at 800 it is still a mikrotik problem and they must sort it out
 
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Re: RB800 big problem

Mon Jun 07, 2010 9:31 am

to say one more time RB800 ROUTERS STOP WORKING .
require the exclusion and inclusion of electricity every hour or breaks down

that shows the right temperature or not, but our teams were in locations where there are routers
RB800 reported that the router is too hot

to add a box in which there are routers with air, and is currently adding an additional two fans, but it is all bad if the manufacturer can not supply such equipment to be
but need to do more update
we use all models that mikrotik has to offer and we never had problems with overheating
hi
have you found the problem yet
 
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Re: RB800 big problem

Mon Jun 07, 2010 7:12 pm

thanks for the reply
i will try to drop the speed to 667 when it is 24c outside
if this is a cpu speed problem and only some chips can run at 800 it is still a mikrotik problem and they must sort it out
how can i -safely- change the frequency, i know that in console it is in:
/system/routerboard/settings/

but i need the now right frequency - i have two boards in importatnt places....

rb800 have is too powerfull for me, i don't need it.
i need a stable router like RB600

thanks
 
mars
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Re: RB800 big problem

Mon Jun 07, 2010 7:32 pm

hi
it is 600MHz
 
kubiik
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Re: RB800 big problem

Mon Jun 07, 2010 9:08 pm

hi
it is 600MHz
so i should try to change it to 600MHz exactly?

i don't have spare RB800 only lots of RB433, 532, 133 and some WRAPs...

i don't want to have troubles in early morning - i want to try to change it about 6AM our local time...
 
mars
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Re: RB800 big problem

Tue Jun 08, 2010 12:22 am

yes 600
 
bintang
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Re: RB800 big problem

Tue Jun 08, 2010 7:04 am

i have same problem , never solved ... why .. why
 
kubiik
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Re: RB800 big problem

Tue Jun 08, 2010 8:53 am

ok;

so i set 600MHz in BIOS
but i cannot find "keep frequency" like in older RBs
it is done, when i switch it only once in BIOS?
 
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Re: RB800 big problem

Tue Jun 08, 2010 10:40 am

ok;

so i set 600MHz in BIOS
but i cannot find "keep frequency" like in older RBs
it is done, when i switch it only once in BIOS?
10:40 AM
MT 3.30
outside temp: 30 deg
cpu temp: 88 deg
....
 
aaa
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Re: RB800 big problem

Tue Jun 08, 2010 11:05 am

Yes, just change CPU freq. and reboot RB.
 
mars
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Re: RB800 big problem

Tue Jun 08, 2010 12:30 pm

10:40 AM
MT 3.30
outside temp: 30 deg
cpu temp: 88 deg

does it work at 88 deg or does it reboot under load
 
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THG
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Re: RB800 big problem

Tue Jun 08, 2010 2:43 pm

mars,

I just looked at the data sheet on the CPU (Freescale MPC8544E) and the temperature range is 0C to 105C.
Extended temperature range = -40º to +105ºC

http://cache.freescale.com/files/netcom ... 8544FS.pdf

As Tom said, the problem must be something else like bad ventilation or low temperature range of radio cards. Check the specification of the Mini-PCI network adapters. :)
Last edited by THG on Tue Jun 08, 2010 3:14 pm, edited 1 time in total.
 
kubiik
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Re: RB800 big problem

Tue Jun 08, 2010 2:46 pm

10:40 AM
MT 3.30
outside temp: 30 deg
cpu temp: 88 deg

does it work at 88 deg or does it reboot under load
01:40 PM
MT 3.30
outside temp: 33 deg
cpu temp: 88 deg

i am glad it is stil working
 
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Re: RB800 big problem

Tue Jun 08, 2010 2:50 pm

it is working because you have good ventilation into case, it seems that at this moment those aluminium cases with ventilation are very good.
 
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normis
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Re: RB800 big problem

Tue Jun 08, 2010 3:02 pm

Those of you that have temperature problems, could try to connect a second fan for the box and wireless cards. That's why there are 4 Fan connectors (there are two pairs, only one fan works in a pair, the other starts when first fails).
No answer to your question? How to write posts
 
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Re: RB800 big problem

Tue Jun 08, 2010 3:03 pm

it is working because you have good ventilation into case, it seems that at this moment those aluminium cases with ventilation are very good.
yes,
i have big case with som other components inside + 12cm fans (one in, one out)

can you give me the link for that aliminium cases?
 
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Re: RB800 big problem

Tue Jun 08, 2010 3:27 pm

RB800 temperature range is -75℃ to +65℃ according to the specification. You need ventilated enclosures with fans if the temperature reaches +65℃.
 
mars
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Re: RB800 big problem

Tue Jun 08, 2010 4:14 pm

Those of you that have temperature problems, could try to connect a second fan for the box and wireless cards. That's why there are 4 Fan connectors (there are two pairs, only one fan works in a pair, the other starts when first fails).

Why would you have 3.3v and 5v connectors on the board if all fans are using 12v
If the rb800 is -75deg c to +65 deg c why do you have such bad cooling on the board
Did you not think the rb will get hot under load in the enclosure

we use r5h and r52hn cards
 
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THG
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Re: RB800 big problem

Tue Jun 08, 2010 4:26 pm

If the rb800 is -75deg c to +65 deg c why do you have such bad cooling on the board
The board has no cooling at all, do you mean the CPU cooler? :?
 
mars
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Re: RB800 big problem

Tue Jun 08, 2010 4:48 pm

yes the cpu heatsink and fan
 
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THG
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Re: RB800 big problem

Tue Jun 08, 2010 5:14 pm

The problem is not the CPU temperature, but the system temperature.
 
mars
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Re: RB800 big problem

Tue Jun 08, 2010 6:55 pm

then mikrotik must say extra cooling is needed in their documentation
 
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Re: RB800 big problem

Tue Jun 08, 2010 7:24 pm

Hello everyone, sorry for my English,

like you I have a problem with the temperature of the RB800, frankly I am disappointed about the problem because my computer is currently in production,

at this time the ambient temperature of 30 º C

I managed to greatly improve the temperature of the rb800 putting it in a waterproof case to which I have put two fans you stick him out air and other .....

I have made from one I saw on the net,,, now with 30 ° c outside the cpu was 58 º c
but I live in southern Spain and in a month will reach the 38 º -42 º

if we make a simple rule of three cpu reach 70 º -72 º and that is very disturbing .....
 
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THG
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Re: RB800 big problem

Tue Jun 08, 2010 7:51 pm

then mikrotik must say extra cooling is needed in their documentation
Why? :?

It's up to you to use a proper enclosure. You installed RB800 in the enclosure EN-UT7 which is designed for RB600.
 
rmichael
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Re: RB800 big problem

Tue Jun 08, 2010 10:31 pm

What Mikrotik could do is put power usage spec in their brochure to help with the selection of right hardware. i.e. if I see that power usage has doubled I would be weary of using the same enclosure. My guess is that power usage of RB800 is 2.5x that of RB600.
 
kubiik
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Re: RB800 big problem

Wed Jun 09, 2010 12:38 am

i was amazed...why 5 or 3,3 voltage been chosen???? 12v is standard....

rb800 is very hot even if 600MHz frequency is chosen - it is situated in well fan cooled outdoor case

i am realy affraid of hot summer, if i have problems now...

i heard from my distributor, that RB1100 is even hotter :((

bad bad design....
 
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Re: RB800 big problem

Wed Jun 09, 2010 12:45 am

i was amazed...why 5 or 3,3 voltage been chosen???? 12v is standard....

rb800 is very hot even if 600MHz frequency is chosen - it is situated in well fan cooled outdoor case

i am realy affraid of hot summer, if i have problems now...

i heard from my distributor, that RB1100 is even hotter :((

bad bad design....
Don't believe everything that you hear. How much experience does he have with this? The RB/1100 is running the same CPU, same frequency with a much larger heat sink and dual fans. Also larger case with good ventilation.

I have had an RB1100 running in our lab for a few days and it is staying very, very cool. Although it is running indoors in an air-conditioned office.

I would call that good, good, design. Or do you mean "bad" in Michael Jackson speak?

Tom
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Tom, CCNA, ISP, USA Mikrotik Distributor
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mars
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Re: RB800 big problem

Wed Jun 09, 2010 9:37 am

if this is the case why does the rb800 not have dual fans and a larger heatsink
this tells me that the problem was seen by mikrotik and ajusted for the rb 1100
come on mikrotik we paid for our rb800 why is there no answer from you only from the people in the forum
 
aaa
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Re: RB800 big problem

Wed Jun 09, 2010 10:19 am

Did you see any 12v fan on any new laptop computer?! If you tell something you must be sure that your informatin is right otherwise you sound like total beginner.

i was amazed...why 5 or 3,3 voltage been chosen???? 12v is standard....

rb800 is very hot even if 600MHz frequency is chosen - it is situated in well fan cooled outdoor case

i am realy affraid of hot summer, if i have problems now...

i heard from my distributor, that RB1100 is even hotter :((

bad bad design....
 
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THG
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Re: RB800 big problem

Wed Jun 09, 2010 10:22 am

We do not work for MikroTik, but that does not mean that we are wrong. I shut down two of my RB800 and installed it in a box similar to EN-UT7. The time here is 09:15 and the outside temperature is 16,6°C.

Outside temperature 16,6°C
Inside temperature 45,3°C

I have one unit in direct sunlight and the temperature is around 20,0°C higher. Let's see the result after a few hours. :)
 
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Re: RB800 big problem

Wed Jun 09, 2010 10:27 am

We do not work for MikroTik, but that does not mean that we are wrong. I shut down two of my RB800 and installed it in a box similar to EN-UT7. The time here is 09:15 and the outside temperature is 16,6°C.

Outside temperature 16,6°C
Inside temperature 45,3°C

I have one unit in direct sunlight and the temperature is around 20,0°C higher. Let's see the result after a few hours. :)
awaiting results....
 
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Re: RB800 big problem

Wed Jun 09, 2010 10:58 am

I don't think it's hot enough at the moment where I live, maybe in a few weeks. :)

Where do you live, and what is the outside temperature?
 
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Re: RB800 big problem

Wed Jun 09, 2010 11:19 am

I don't think it's hot enough at the moment where I live, maybe in a few weeks. :)

Where do you live, and what is the outside temperature?
slovakia, 30deg.

so after this "hang" (15minues ago,...10km away from office...) i have finally decided to remove that piece of ....
i will return 2 rb433ah there
 
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Re: RB800 big problem

Wed Jun 09, 2010 11:28 am

Is you unit exposed to direct sunlight?
 
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normis
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Re: RB800 big problem

Wed Jun 09, 2010 11:31 am

I don't think it's hot enough at the moment where I live, maybe in a few weeks. :)

Where do you live, and what is the outside temperature?
slovakia, 30deg.

so after this "hang" (15minues ago,...10km away from office...) i have finally decided to remove
I think you have other issues, this is nothing we have seen in our tests. Believe me, our temperature chamber is quite advanced, it simulates ambient temperature with air circulation and whatnot. And the only thing we have seen is that above 70C ambient (not CPU) the speed of wireless starts to decrease, but no disconnects until at least 80C outside temperature (not CPU)
No answer to your question? How to write posts
 
mars
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Re: RB800 big problem

Wed Jun 09, 2010 9:44 pm

hi normis

why dont you tell us about your tests so we know what is going on and what to do

by the way do you have skype
 
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normis
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Re: RB800 big problem

Thu Jun 10, 2010 8:10 am

I already told you about our tests, what else do you want to know?
No answer to your question? How to write posts
 
cuccio
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Re: RB800 big problem

Thu Jun 10, 2010 4:44 pm

confirm that the rb800 crashes with outside temperatures of 30 ° C.
Today, 3 customers in Italy have had the same problem.
It is not suitable to be enclosed in a box.
Put into production the RB600, thanks.

BR
C.
 
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THG
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Re: RB800 big problem

Thu Jun 10, 2010 5:59 pm

What is the temperature inside the unit? It would be interesting to know. :)
 
mars
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Re: RB800 big problem

Thu Jun 10, 2010 7:07 pm

What is the temperature inside the unit? It would be interesting to know. :)
we are busy testing now
 
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Re: RB800 big problem

Fri Jun 11, 2010 10:59 am

We have same problem, when temperature up to 30 c*, RB800 hang, only power off/on can starts up. MIKROTIK fix this bug, tower 80 meters, it hard to up/down several time in day.....
Τι μάτια βλ., μυαλά πιστεύουν
bel.net.ua
 
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THG
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Re: RB800 big problem

Fri Jun 11, 2010 11:38 am

What kind of enclosure do you use, EN-UT7?
 
kubiik
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Re: RB800 big problem

Fri Jun 11, 2010 11:52 am

Is you unit exposed to direct sunlight?
noooo
in outdoor case with ventilation
 
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Re: RB800 big problem

Fri Jun 11, 2010 12:05 pm

so the first rb800 is removed (now is there rb433ah and rb532 instead), we are without problems now.
The thing is, when i opened the box where rb800 was situated (box 100cm X 20cm X 50cm, well ventilated) it was not so hot inside.....

yesterday we had another problem with second RB800 in plastic outdoor box, which exactly fit for RB....outside temperature 33 deg. frozen.....

i want my rb600 back :(
 
cuccio
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Re: RB800 big problem

Fri Jun 11, 2010 12:29 pm

please back to the RB600 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

C.
 
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normis
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Re: RB800 big problem

Fri Jun 11, 2010 12:42 pm

so the first rb800 is removed (now is there rb433ah and rb532 instead), we are without problems now.
The thing is, when i opened the box where rb800 was situated (box 100cm X 20cm X 50cm, well ventilated) it was not so hot inside.....

yesterday we had another problem with second RB800 in plastic outdoor box, which exactly fit for RB....outside temperature 33 deg. frozen.....

i want my rb600 back :(
this just means your problem was not related to temperature. you should check other issues instead of fixating on this one thing
No answer to your question? How to write posts
 
kubiik
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Re: RB800 big problem

Fri Jun 11, 2010 1:08 pm

so the first rb800 is removed (now is there rb433ah and rb532 instead), we are without problems now.
The thing is, when i opened the box where rb800 was situated (box 100cm X 20cm X 50cm, well ventilated) it was not so hot inside.....

yesterday we had another problem with second RB800 in plastic outdoor box, which exactly fit for RB....outside temperature 33 deg. frozen.....

i want my rb600 back :(
this just means your problem was not related to temperature. you should check other issues instead of fixating on this one thing
i don't think is my/our problem.

i never had problem like this with any other RBs,
RB is very hot and is not apropriate for outdoor operatinos.... unless you will put some special cooling mechanism there....

but summer is beginning, so we will see in september if we were wrong
 
rmichael
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Re: RB800 big problem

Fri Jun 11, 2010 1:19 pm

so the first rb800 is removed (now is there rb433ah and rb532 instead), we are without problems now.
...
The thing is, when i opened the box where rb800 was situated (box 100cm X 20cm X 50cm, well ventilated) it was not so hot inside.....
...
RB is very hot and is not apropriate for outdoor operatinos.... unless you will put some special cooling mechanism there....
...
If inside of the box was not so hot and you're convinced board overheated then try re-seating the heatsink or even use better thermal compound.
Last edited by rmichael on Fri Jun 11, 2010 7:52 pm, edited 1 time in total.
 
mars
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Re: RB800 big problem

Fri Jun 11, 2010 7:10 pm

we are now testing with ut7 box
we have a 20mm vent at the top on each side and filters so water can not enter
we have a 120mm intake fan in front at the bottom with cover and filter to stop water blowing in
we fitted a electronic unit to monitor temprature inside the box and controll the fan
fan will switch on at 30 deg c and off at 29.5 deg c
temprature outside 18 deg c
temprature in box 21.6 deg c
cpu temprature 54 deg c
cpu usage 40 %
so far the fan has not come on yet as box temp has not reached 30 deg c inside
there is quite a big diffirence but we are waiting for 30 deg c outside temp to see what happens
then i will post again
Last edited by mars on Sun Jun 13, 2010 1:01 pm, edited 3 times in total.
 
cuccio
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Re: RB800 big problem

Fri Jun 11, 2010 9:34 pm

Sorry, but our devices are IP67.
Somebody have solutions without holes ??

Regard
C.
 
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promind
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Re: RB800 big problem

Sun Jun 13, 2010 12:27 pm

Another MikroTik product and yet another MikroTik disappointment...
I've bought 3 of these cr*ppy RB800 to establish 802.11N link with 4 UBNT SR-71A cards.
All seemed to work fine when temperatures were ~15/20C but when raised to 30+ I see a lot of wireless errors which bother me.

1. "too many poll timeouts" on the AP side.
2. "not polled for too long" on Client side.

Have tried vpls,WDS, EoIP bridge.
Tried ventilating the aluminum cases(with RB433AH I don't have that problem) and still during day time I see these errors.
Everything goes back to normal when the sun isn't shining anymore.
Well what do you expect to tell my customers? "DON'T USE INTERNET WHEN IT'S OVER 30C!!!"
When I open the case board seems to work fine but I can't leave it open.
 
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THG
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Re: RB800 big problem

Sun Jun 13, 2010 7:35 pm

Tried ventilating the aluminum cases(with RB433AH I don't have that problem) and still during day time I see these errors.
Everything goes back to normal when the sun isn't shining anymore.
What a surprise! Do you know how much heat load direct sunlight will generate?
Well what do you expect to tell my customers? "DON'T USE INTERNET WHEN IT'S OVER 30C!!!"
Tell your customers that you choosed an enclosure that is not designed for such temperatures.
When I open the case board seems to work fine but I can't leave it open.
Doesn't that reveal that this enclosure needs cooling? It would be easy to find out with Newton's Law of Cooling.

I can calculate the heat load if you give me the outside temperature, temperature inside the enclosure, color of the enclosure, and the dimensions of the enclosure. You can also tell me the orientation of the enclosure, and if it is exposed of direct sunlight.

After that, I can tell you if you need cooling, and how much depending of the desired enclosure inside temperature.

1. Outside temperature.
2. Temperature inside the enclosure.
3. Dimensions of the enclosure.
4. Desired inside temperature of the enclosure.
5. Color of the enclosure (Light Painted, Dark Painted, or Stainless Steel).
6. Exposed of direct sunlight.
7. Orientation of the enclosure, vertical or horizontal orientations (only if exposed of direct sunlight).
 
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promind
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Re: RB800 big problem

Sun Jun 13, 2010 7:39 pm

I can calculate this myself, don't you think?
Why I don't have that problem with RB433AH,RB600,x86 and etc. which are also exposed to direct sunlight.
Cases are solid aluminum and have enough space for ventilation(I've put myself 2 hi speed coolers but they don't do the work).
I think I'll switch back to x86 which seemed to perform a lot better.
P.S: It's not exposed to direct sunlight because the antenna itself is making shadow of it.
 
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THG
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Re: RB800 big problem

Sun Jun 13, 2010 7:50 pm

Do it, calculate and you'll find out the problem. RB433AH and RB600 generates less heat load than RB800, and the same thing applies to computers with different CPU's. Disconnect the PSU fan to a computer, and the case will reach temperatures so you'll burn yourself if you touch it.
 
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promind
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Re: RB800 big problem

Sun Jun 13, 2010 8:01 pm

Ok.
Tomorrow I'll be changing cases and will put big 35x25x20 metal cases with 2x120mm 4500rpm vents.
Current cases are:
http://www.vesuviustreamline.com/produc ... oards.html
Current vents are:
2x http://www.dekada.com/catalog/fan-50x50 ... p-363.html
Interesting thing is that one of the boards seem to perform without problems even that /system health says higher temperature(72C).
The other 2 boards don't go above 63/64. Boards do not get stuck or die or whatever...just the wireless interfaces get disconnected with these 2 reasons I've posted above in my first post.
I will replace this enclosures with larger ones and better ventilated, but if it's not related to heat I'll waste a big amount of money for nothing.
 
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Re: RB800 big problem

Sun Jun 13, 2010 8:46 pm

Maybe it's a problem with the other units if one works as expected. The larger enclosure looks nice, and I would be suprised if you have the same issue. It should work, even without fans, but it's always nice to have it due to increased MTBF.
 
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Re: RB800 big problem

Mon Jun 14, 2010 3:25 pm

Hi,

Same situation, RB800 crashed, problem exist, but how we can solve problem without MT support? Please, try to find some solutions or I must change RB800 with other one (433AH..), every day I must reboot few times RB to try work fine. Simple questions, Why we don’t have problem at night?

Thanks,

GoranST
 
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Re: RB800 big problem

Mon Jun 14, 2010 3:51 pm

I think i just hit a bug in ROS 4.10 and 5.0beta2 on RB1000 dont know how to reproduce it but for some reason the cpu went high usage because a lot of traffic was generating between the router and winbox don't know it this will help , but just to metion it. I had to uncheck the Load last session on winbox!!

God speed!
 
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promind
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Re: RB800 big problem

Mon Jun 14, 2010 6:41 pm

Changed enclosures with much bigger and with good ventilation + additional fan.
I'll report success/failure tomorrow during day time :)
 
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promind
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Re: RB800 big problem

Tue Jun 15, 2010 12:49 pm

Here are some pictures of the actual enclosure and the routerboard inside.

P.S: It's 13:00 and the sun is burning over 50C and the link is still working.
That's good news for me and my customers.
You do not have the required permissions to view the files attached to this post.
Last edited by promind on Tue Jun 15, 2010 1:04 pm, edited 1 time in total.
 
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normis
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Re: RB800 big problem

Tue Jun 15, 2010 1:03 pm

wow very nice!

nevertheless, we are also looking into the wireless issues some customers see at high temperatures. it seems that only a small part of people with RB800 in hot places are seeing this problem, so it's not a generic issue.
No answer to your question? How to write posts
 
roy1
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Re: RB800 big problem

Tue Jun 15, 2010 1:25 pm

OK normis , but fan on cpu heatsink is active part , and what if after some period , lets say , 6 months or 1 year , it stop working.
people will write to the forum once again the poor development of the router just because there is no bigger cooler.

I can confirm that all my router ( only rb800 ) stopped working because of the heat which could cause poor cooling.
solution is to add two extra fans near cpu and close voltage regulation components.
 
goranst
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Re: RB800 big problem

Tue Jun 15, 2010 3:20 pm

OK normis , but fan on cpu heatsink is active part , and what if after some period , lets say , 6 months or 1 year , it stop working.
people will write to the forum once again the poor development of the router just because there is no bigger cooler.

I can confirm that all my router ( only rb800 ) stopped working because of the heat which could cause poor cooling.
solution is to add two extra fans near cpu and close voltage regulation components.

I agree, If we have several RB800, we must check fan cpu every few month to be sure that work fine. Or, make some monster enclosure with big fans and pipes. Sometimes I haven’t chance to make big enclosure for RB on some positions. What happened with RB when outside temperature is under 0C and extra fans work in enclosure.

GoranSt
 
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Re: RB800 big problem

Tue Jun 15, 2010 3:40 pm

Like I have previously said, it works fine even only with heatsink. Only a few devices show issues with wireless+heat. This is not universal, as many have no issues even with 70C temperature.

So if you have a normal RB800, there should be no issue even if cooler malfunctions.
No answer to your question? How to write posts
 
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Re: RB800 big problem

Tue Jun 15, 2010 4:07 pm

The problem seems to be the wireless card, I installed an SR71-12 card and run into the same issue.
 
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Re: RB800 big problem

Tue Jun 15, 2010 4:10 pm

An hour and a half later this happened...
CPU is 62/63C Outside temp is ~40C(actually 50+ under the sunlight)
Enclosures doesn't seem to fix the problem...
What should I do? Replace the items with x86 and throw away ~$1200+ ?

P.S. It's not the wireless card because with RB433AH which is not ventilated I don't have that problem.

P.S2: I can replace cards with R52hN but if this doesn't fix the problem I'll waste another sum.

Please give me some advise or some temporary solution.
You do not have the required permissions to view the files attached to this post.
 
cacawe
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Re: RB800 big problem

Tue Jun 15, 2010 10:05 pm

I made a similar case, (when I can I would put photos)
although I did not use a tube to keep out the water I did was stick a square cover over the hole of the fan and this cover is opened by the bottom (the water can not rise)

in any case I think you thought your job ...
except for one thing ........

I have two fans in the box, one air and one gets it out,

home are well come down a few degrees more ....
 
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promind
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Re: RB800 big problem

Tue Jun 15, 2010 10:46 pm

The 4 big nozzles you see are empty(covered with net against the bugs that can get in) and the fresh air is sucked through them.
Ventilation inside the box is quite good and hot air is not cycling.
I must put bigger vent inside and additional power source to make it work better(5V on 12V vent isn't enough fast).
I have a few noisy PowerMac G4 MDD delta fans[ they were told "wind tunnel" almost a decade ago, because of the noise they made :) ]which can do the job.

All suggestions are welcome. I must fix this problem in a very short period of time.
I'm already working on the problem by providing alternative FO connection, but that will only shorten my financial status :)
 
cacawe
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Re: RB800 big problem

Wed Jun 16, 2010 11:53 am

the promised photos of my work ....
Image

Image

Image




not very well done aesthetically, but sure that water does not go ......

far temperatures have dropped here but surely soon surpass 38 degrees at room temperature

then see if you pass the test ....

is sad to have to do this extra work to keep customers without service ......

I'm a little disappointed
 
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THG
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Re: RB800 big problem

Wed Jun 16, 2010 1:12 pm

It's hard to tell what exactly causes your problems without having more detailed information. My router works flawlessly up to 70°C, and MikroTik said that they tested it up to 80°C.

When talking about your problems don’t leave out any details so that we will understand all that is going on. Please, avoid reports that say nothing ("It doesn't work!"); reports that make no sense; reports that don't give enough information; reports that give wrong information.

In a nutshell, the aim of a report is to enable the maker to see the product failing in front of them. You can either show them in person, or give them careful and detailed instructions on how to make it fail. If they can make it fail, they will try to gather extra information until they know the cause. If they can't make it fail, they will have to ask you to gather that information for them.

In reports, try to make very clear what are actual facts ("I was at the router and this happened") and what are speculations ("I think the problem might be this"). Leave out speculations if you want to, but don't leave out facts.

When you report a problem, you are doing so because you want the problem fixed. There is no point in swearing at the maker or being deliberately unhelpful: it may be their fault and your problem, and you might be right to be angry with them, but the problem will get fixed faster if you help them by supplying all the information they need.
 
mars
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Re: RB800 big problem

Thu Jun 17, 2010 10:03 am

It's hard to tell what exactly causes your problems without having more detailed information. My router works flawlessly up to 70°C, and MikroTik said that they tested it up to 80°C.

When talking about your problems don’t leave out any details so that we will understand all that is going on. Please, avoid reports that say nothing ("It doesn't work!"); reports that make no sense; reports that don't give enough information; reports that give wrong information.

In a nutshell, the aim of a report is to enable the maker to see the product failing in front of them. You can either show them in person, or give them careful and detailed instructions on how to make it fail. If they can make it fail, they will try to gather extra information until they know the cause. If they can't make it fail, they will have to ask you to gather that information for them.

In reports, try to make very clear what are actual facts ("I was at the router and this happened") and what are speculations ("I think the problem might be this"). Leave out speculations if you want to, but don't leave out facts.

When you report a problem, you are doing so because you want the problem fixed. There is no point in swearing at the maker or being deliberately unhelpful: it may be their fault and your problem, and you might be right to be angry with them, but the problem will get fixed faster if you help them by supplying all the information they need.


tell me what is your outside temprature?
the 20 people i have spoken to in my country all have the same problems
it is funny that you and Mikrotik are the only 2 people not having a problem
 
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THG
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Re: RB800 big problem

Thu Jun 17, 2010 1:13 pm

tell me what is your outside temprature?
the 20 people i have spoken to in my country all have the same problems
it is funny that you and Mikrotik are the only 2 people not having a problem
It's not hot enough where I live, so I'm using an environmental test chamber, the surrounding temperature was 70°C.

If it was as someone said (a bad design", more people would complain since the outside temperature are quite high right now. To get a better understanding what the problem is, affected users should give detailed information about their installation (bios, firmware, wireless hardware, power supply, temperatures etc.). Don't leave out anything relative to this issue.
 
rmichael
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Re: RB800 big problem

Thu Jun 17, 2010 9:03 pm

@40W your enclosure needs to remove 144000 Joules/hour
@16W it's 57600 Joule/hour

So any case that works well with RB4xxAH series will need to dissipate almost three times the heat with RB800.

As in PC design airflow matters. Sometimes having too many openings is counterproductive as it reduces airflow. For more effective heat exchange put stickon heatsink on the heatspreader, memory chips, add bigger heatsink on the cpu (perhaps chipset heatsink would work - like Zalman 47J?) suck the air at the very top of the case and let the fresh air from the bottom to avoid heat pockets.

Before doing all that install remote temperature monitoring unit ( like TMP3E-ES1-BAS) and plot outside temp vs inside temp vs load and determine if problem is really overheating...
 
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Re: RB800 big problem

Tue Jun 22, 2010 6:27 pm

The RB433AH was mentioned just for the "wireless card problem".
If the wireless card was overheating then the RB433AH would have that problem.
The only problem I get is from the RB800 which now is quite good ventilated and don't have that problem...but the temperatures here match significant decrease...from 50+ under the sun to ~30.
Last week weather was very helpful :)
Anyway with RB800 on 29km 1x1 link I got 112Mbps REAL bandwidth...well close to real because I've only tested it with several users simultaneously downloading stuff.
I'm planning to do dual polarity feedhorns... anyone done that with 802.11n yet?
Should I even try doing that or it's pointless? I have experience with 2 separate antennas and the results were amazing...190Mbps (close to real - look above) bandwidth.
 
mars
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Re: RB800 big problem

Wed Jun 23, 2010 1:22 pm

we are now testing with ut7 box
we have a 20mm vent at the top on each side and filters so water can not enter
we have a 120mm intake fan in front at the bottom with cover and filter to stop water blowing in
we fitted a electronic unit to monitor temprature inside the box and controll the fan
fan will switch on at 30 deg c and off at 29.5 deg c
temprature outside 18 deg c
temprature in box 21.6 deg c
cpu temprature 54 deg c
cpu usage 40 %
so far the fan has not come on yet as box temp has not reached 30 deg c inside
there is quite a big diffirence but we are waiting for 30 deg c outside temp to see what happens
then i will post again

outside temp is 22 c
box temp 35 c
cpu temp 72 c
now the links start to drop and we have to reboot the rb and wait for it to cool down
this is definitely a cpu heat problem and i think it is time for mikrotik to do something about it
we will check for 1 more day as it is not even realy hot in our country and then we will return the rbs to the supplier
 
rmichael
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Re: RB800 big problem

Wed Jun 23, 2010 8:19 pm



outside temp is 22 c
box temp 35 c
cpu temp 72 c
now the links start to drop and we have to reboot the rb and wait for it to cool down
this is definitely a cpu heat problem and i think it is time for mikrotik to do something about it
we will check for 1 more day as it is not even realy hot in our country and then we will return the rbs to the supplier
Difference between outside and inside temp is too high. You need to make the top vents larger.
 
mars
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Re: RB800 big problem

Thu Jun 24, 2010 1:26 am



outside temp is 22 c
box temp 35 c
cpu temp 72 c
now the links start to drop and we have to reboot the rb and wait for it to cool down
this is definitely a cpu heat problem and i think it is time for mikrotik to do something about it
we will check for 1 more day as it is not even realy hot in our country and then we will return the rbs to the supplier
Difference between outside and inside temp is too high. You need to make the top vents larger.

and what will you do when the outside temp is 35 - 40 c ?
 
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Re: RB800 big problem

Thu Jun 24, 2010 12:16 pm



outside temp is 22 c
box temp 35 c
cpu temp 72 c
now the links start to drop and we have to reboot the rb and wait for it to cool down
this is definitely a cpu heat problem and i think it is time for mikrotik to do something about it
we will check for 1 more day as it is not even realy hot in our country and then we will return the rbs to the supplier
Difference between outside and inside temp is too high. You need to make the top vents larger.

and what will you do when the outside temp is 35 - 40 c ?
You could also try to reseat the heatsink and use good thermal paste. But your main issue at the moment is box ventilation.

Have you also considered that the box could be heating up from exposure to direct sunlight? If so, you'll need even higher air flow inside or sunshade for your enclosure.
 
mars
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Re: RB800 big problem

Thu Jun 24, 2010 6:08 pm

the cpu can work up to 105 c
the rb can work at 65 c
it is 35 c in the box
it is 25 c outside
the chip is running at 70 c
that means the rb and cpu is within its limits and dont need more cooling yet it still drops the links and disconnect

I am realy tired of the answers i am getting it is like the people are not reading the post or dont understand what they are reading
thanks to the people that provided answers that was helpfull

To mikrotik
for a product that is so expensive i just want to say This is bad workmanship and i hope you sort out your problems
Next time admit when you have a product with a problem and dont let the customer suffer because of you
 
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Re: RB800 big problem

Thu Jun 24, 2010 10:01 pm

I am realy tired of the answers i am getting it is like the people are not reading the post or dont understand what they are reading
You are just whining and complaining instead of providing any useful info.

I bet you purchased cheap wireless cards from China, and now you are bitching and moaning how bad Routerboard has become.

There is no patch for human stupidity.
 
mars
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Re: RB800 big problem

Fri Jun 25, 2010 1:02 am

I am realy tired of the answers i am getting it is like the people are not reading the post or dont understand what they are reading
You are just whining and complaining instead of providing any useful info.

I bet you purchased cheap wireless cards from China, and now you are bitching and moaning how bad Routerboard has become.

There is no patch for human stupidity.

sorry to disapoint you
we have supplied enough information and tests
all our products is mikrotik
 
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Re: RB800 big problem

Fri Jun 25, 2010 1:27 am

We use in our network approximately 15x RB800 (North of the Czech Republic), and only about 2 or 3 have no problems. For all other problems started with hangs when the ambient temperature exceeds 25 ° C. Everywhere is the last RouterOS 4.10 and the latest firmware 2.27. Power is different, jack, PoE, Solar, 18V, 24V or 48V. Wireless cards are 95% of R52, the other 5% CM9. Most RB800 is expanded with RB604 with additional 2-4 cards.

We tried a variety of additional cooling, reducing the frequency (this affects only a maximum temperature of 1-2 ° C). Additional cooling will help RB800 withstand ambient temperature around 30 ° C, but then also hangs. Specific findings are also, simply restart the RB800 at high ambient temperatures, and then he easily several hours of operation will last. Temperature after the restart, still remains high!

We have consulted our problems with the supplier, and was told that Mikrotik knows about this problem and is working on it. At the same time we were offered a full refund for all of our RB800. Which unfortunately is not the solution we need.

We need a functional RB800!!! :(
 
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Re: RB800 big problem

Fri Jun 25, 2010 1:28 am

We use in our network approximately 15x RB800 (North of the Czech Republic), and only about 2 or 3 have no problems. For all other problems started with hangs when the ambient temperature exceeds 25 ° C. Everywhere is the last RouterOS 4.10 and the latest firmware 2.27. Power is different, jack, PoE, Solar, 18V, 24V or 48V. Wireless cards are 95% of R52, the other 5% CM9. Most RB800 is expanded with RB604 with additional 2-4 cards.

We tried a variety of additional cooling, reducing the frequency (this affects only a maximum temperature of 1-2 ° C). Additional cooling will help RB800 withstand ambient temperature around 30 ° C, but then also hangs. Specific findings are also, simply restart the RB800 at high ambient temperatures, and then he easily several hours of operation will last. Temperature after the restart, still remains high!

We have consulted our problems with the supplier, and was told that Mikrotik knows about this problem and is working on it. At the same time we were offered a full refund for all of our RB800. Which unfortunately is not the solution we need.

We need a functional RB800!!! :(
 
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Re: RB800 big problem

Fri Jun 25, 2010 7:45 pm

How is it possible that one RB800 have after 5 minutes from start temperature 45°C, and the other one in the same place, same source, same cards, have after 5 minutes of operation temperature 65°C?
 
hrvoje
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Re: RB800 big problem

Fri Jun 25, 2010 10:58 pm

what power supply are You using ? POE - how long cables? sometimes bad power supply can do the mess.
 
adrianatkins
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Re: RB800 big problem

Sat Jun 26, 2010 12:04 am

Be Careful Guys.

If you get too annoyed and post a lot you can get yourself kicked off altogether.

Worked for me on Ubiquiti's forum :)
Don't forget to give me at least a tenner a month, every month
 
mars
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Re: RB800 big problem

Sat Jun 26, 2010 2:13 am

we received a new rb800 today from the supplier and when we fit it i will post again
 
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THG
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Re: RB800 big problem

Sun Jun 27, 2010 12:19 am

sorry to disapoint you
we have supplied enough information and tests
all our products is mikrotik
We asked for exact details regarding your issue, hardware, software, bios etc. You never gave us a straight answer when we asked for it. MikroTik asked multiple times what people are using for wireless cards, no response in 5 week to that question. The same thing what power supply you use, but not a single response. You are also using a beta version of RouterOS.

The only thing you told us is that you installed RB800 with three radio cards in an UT7 enclosure, and now you have problems with your wireless connection when outside temperature reach 24°C.

We are not mind readers or have a crystal ball, so what do you expect from us? :?
 
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Re: RB800 big problem

Sun Jun 27, 2010 3:01 am

sorry to disapoint you
we have supplied enough information and tests
all our products is mikrotik
We asked for exact details regarding your issue, hardware, software, bios etc. You never gave us a straight answer when we asked for it. MikroTik asked multiple times what people are using for wireless cards, no response in 5 week to that question. The same thing what power supply you use, but not a single response. You are also using a beta version of RouterOS.

The only thing you told us is that you installed RB800 with three radio cards in an UT7 enclosure, and now you have problems with your wireless connection when outside temperature reach 24°C.

We are not mind readers or have a crystal ball, so what do you expect from us? :?


we have supplied all the information you asked for to the supplier we bought the rb800 from in my country
he forwarded the information to mikrotik
if you are not happy i will supply you with their details and you can take the matter up with them
 
rmichael
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Re: RB800 big problem

Sun Jun 27, 2010 4:32 am

we have supplied all the information you asked for to the supplier we bought the rb800 from in my country
he forwarded the information to mikrotik
if you are not happy i will supply you with their details and you can take the matter up with them
What's the point of posting on this forum then?
 
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Re: RB800 big problem

Mon Jun 28, 2010 2:54 pm

we have now replaced the rb800 with a new one and it is running for 2 days
outdside temp 28 deg c
box temp 30 deg c
cpu temp 42 deg c

The only problem we have now is when the cpu reaches 80% the rb reboots
 
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Re: RB800 big problem

Tue Jun 29, 2010 11:24 am

Hi,

I have followed this thread for some time now, I don't have the whole fact here (Please bare with me) but I wonder if anyone has tried to place a RB800 in the same box without the radio cards? Then run some load tests against it.
Does the problem persist then?

From personal experiences I have seen CPU's running at 95C (Old AMD K6) so if the one running in the RB800 can run at 70C I would not be surprised.
That's why I am interested in if there is a external factor involved here. Perhaps it's the case as said or it's the radio cards. Different cards generate different heat. And combined with the increase in heat from the RB800 they will fail or cause the RB800 to fail.
Of course it could be the RB800 I'm not saying it isn't. But I think there are factors here that needs to be looked into before we conclusively say that it this is the case.

I don't have any RB800 in production environment (Only 4xx, 750 and RB1xxx) But I do actually have one of my own running at home for lab testing of the 802.11n. It's placed on the floor in a wooden box (just antennas sticking out) with other electronic equipment. It's around 25-32C inside depending on the temp in the room. The RB800 is clocked to 1000Mhz at the moment and has 1 R52H and 1 R52n and is running ROS v5beta3.
Since I only do testing I don't have a constant load over some time but when I do load/security tests at it the CPU often stays at 100% for quite some time. And I have not yest seen any of these faults that are described in this thread.
This is not by far a good comparison but I see the same temperatures as you guys never the less.

Mars, Have you created a ticket @ MikroTik as well or only with your reseller? If not please do so. This forum is not a official support forum only a way to seek help among fellow Mikrotik users.
We can help you to the best of our knowledge but if you could post what you have done and so on it would be of great help. Please do so as detailed as possible.
MTCNA

"I don't believe UNIX is Utopia. It's just the best set of tools around."
 
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Re: RB800 big problem

Tue Jun 29, 2010 11:27 am

We have found that a very small fraction of the manufactured RB800 devices can exhibit similar symptoms. We are working on a fix for this.

For 99% of the other RB800 there will be no heat problems like I have written before. For the others, ensure good cooling until a fix will be provided.
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TKITFrank
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Re: RB800 big problem

Tue Jun 29, 2010 11:30 am

Normis, Can you please describe more detailed what the cause of the issue is? Is it just software related or when you combine it with a specific radio card?
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Re: RB800 big problem

Tue Jun 29, 2010 11:34 am

It's a hardware issue and has nothing to do with wireless cards. More info will follow.
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Re: RB800 big problem

Tue Jun 29, 2010 12:53 pm

For 99% of the other RB800 there will be no heat problems
DaveCZ wrote: We use in our network approximately 15x RB800 (North of the Czech Republic), and only about 2 or 3 have no problems. For all other problems started with hangs when the ambient temperature exceeds 25 ° C

So how does it happen?
LAN, FTTx, Wireless. ISP operator
 
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Re: RB800 big problem

Tue Jun 29, 2010 6:01 pm

.....i am amazed,
read what i recieved:
Hello,

We have found out that small percentage of RB800 (less than 10%) does
have heating issues when miniPCI slots are populated. Units, that are
reported to have this problem by users, should be returned for
replacement to MikroTik.

If you have users that needs this, please make a list and we will send replacement when we will receive new production in July. We will also pay for return shipping of faulty RB800's to us.

Sorry for inconveniences caused!

Regards,

MikroTik Sales Department
 
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Re: RB800 big problem

Wed Jun 30, 2010 8:34 am

hey normis.. please also fix RB1100 port 11/12/13 problem.. i dont get any solution until now..
 
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Re: RB800 big problem

Wed Jun 30, 2010 8:37 am

hey normis.. please also fix RB1100 port 11/12/13 problem.. i dont get any solution until now..
please tell me your mikrotik support ticket number and I will check solution status
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Re: RB800 big problem

Wed Jun 30, 2010 10:11 am

IMPORTANT

The quoted email was addressed ONLY to DISTRIBUTORS. MikroTik will NOT replace the devices directly. Contact ONLY the seller of the device!
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adrianatkins
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Re: RB800 big problem

Thu Jul 01, 2010 12:48 am

What if the Distro will not speak to us ?

Can we contact Mikrotik directly, or do we have to just forget the money ?
Don't forget to give me at least a tenner a month, every month
 
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Re: RB800 big problem

Thu Jul 01, 2010 9:16 am

Not speak to you? What kind of distributor is that? Buy elsewhere.
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Re: RB800 big problem

Thu Jul 01, 2010 5:16 pm

Ticket#2010061166000237
 
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Re: RB800 big problem

Fri Jul 02, 2010 6:24 pm

37,4 deg outside..... new record this year...
and last RB800 that was in "the field": frozen.... :(
 
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Re: RB800 big problem

Mon Jul 05, 2010 1:11 pm

to normis

hi
can you please explain what the problem is with the rb800 as we have replaced our one with a new one and have the same problem
thanks
 
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Re: RB800 big problem

Mon Jul 05, 2010 1:23 pm

we are preparing a general information guide that will be posted later today
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Stanislav Hrncir
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Re: RB800 big problem

Tue Jul 06, 2010 8:23 pm

any news about guide ?
 
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Re: RB800 big problem

Thu Jul 08, 2010 5:29 pm

I have been having the same issues but no shutdowns yet. Have seen 1 go to 70c sitting by my desk in an enclosure.

I have 4 rb800s lined up. No wireless cards. sitting in open air 75* f room temp. Same firmware. Right out of the box. Why is there such a difference in temps diffs?

Is the temp sensor on the cpu or just somewhere on the board?
I finally got the same response from my reseller "10% failure rate" and they are replacing the Hot boards. What I wouldn't give for some 600's with the mini pci slots not all bunched together.
 
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Re: RB800 big problem

Fri Jul 09, 2010 8:58 am

No answer to your question? How to write posts
 
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Re: RB800 big problem

Tue Jul 13, 2010 2:37 pm

37,4 deg outside..... new record this year...
and last RB800 that was in "the field": frozen.... :(
I understand why all of you have problem with RB800. I live in Northern Europe, and it's the highest temperature measured since 1753 (almost 40°C). :)
 
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Re: RB800 big problem

Wed Aug 04, 2010 6:39 pm

I believe that, if the outdoor equipment by default couple up with the fan, mean there must some potential issue.
and you have to plan well to replace the fan may be few months later.

thus, it's bad idea to design the board with the fan, should looking alternative way to resolve the heat issue.
myself having the RB800, and just keep it in our stock, the reason is when the RB800 reach to 65C, then the wireless link will gone.

it's powerful processor, but it's bad designed as well.
 
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Re: RB800 big problem

Thu Aug 05, 2010 7:04 pm

The key to equipment cooling is to remove heat from the cabinet while supplying cool air to the places that need it. Most often this is accomplished with natural and forced convection, but sometimes cooling via forced convection with chilled air is also used.

Natural convection cooling is adequate for most applications that generate a small amount of heat, provided the cabinet interior offers an unrestricted airflow path. The user must insure that the cabinet has sufficient venting at both the top and bottom to promote airflow and a chimney effect. The best way for natural airflow to circulate within a cabinet is when it is drawn from the bottom up through the top of the enclosure.

A blower can be used at the bottom of the cabinet to create high internal pressure within the cabinet. Hot air can then be exhausted through the top of the cabinet through vents. Sometimes, adding an exhaust fan at the top can improve airflow. Blowers should be fitted with a filter at the air inlet side to prevent dust and lint from entering the cabinet. The high pressure created by the blower inside the cabinet also prevents entry of dust and lint through other openings.
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Re: RB800 big problem

Fri Aug 06, 2010 10:11 am

rb800 confirm that a defective and the solution of the two fans that showed in photos on my old post, is holding up very well the high temperatures in southern Spain (+40 º) .........

rb that has a 800 in production with customers recommend doing the "cool box"

But when I can not give it back to me to replace it with a new ...... flawless but it must be closely monitored its temperature ..
 
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Re: RB800 big problem

Sun Dec 19, 2010 5:12 pm

What about the problem of voltage difference, did a downgrade from version 4.5 to 4.11 which solved the problems that users were not connected or fallen in the wireless interfaces, but returns the voltage that the command system health print dropped by more than 2 volts There is some version of the router to correct these two problems? I need to monitor the voltage, because this is powered by RB800 a solar panel system.
 
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Re: RB800 big problem

Wed Jun 01, 2011 1:03 pm

We too have designed a custom enclosure with forced air circulation for our RB800 solution. Pictures are attached below. Blowers are SUNON 12V 60x60x25mm and they move air at around 39 m3/h, which I think is quite good for a fan of such size. They are powered by a step-down converter from the same 27V power source that powers RouterBoard (no PoE here). Outside temperature being 27 'C - CPU temp reading in winbox shows 55'C.. Will see how it does in extreme summer conditions. It's quite hot on there in summertime, black tarred roof, direct sunlight..
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Re: RB800 big problem

Fri Jun 03, 2011 11:28 am

this topic is more than 1 year old.

some of RB800 devices had a problem with heat (less than 1%), and it was addressed. All of currently sold devices have no problems. if you have other problems, please make a new thread or email support.
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