Hi Nomis

Question1
below your link data is only installed one 3X3 minipci card at RB800.
But CPU Load is 51% during Speed test.

If install 4 minipci card(3X3), CPU load will be very high.
then I think throughput will be quite low.
I worry two things
1. High CPU Load may cause of low throughput
2. 3X3 X 4unit may cause RF interference and it occur low throughput.
did you have test or data about these related test?

My expecting usage is 1:1 or 1:1:1 or 1:2:1 like below picute. Question2
Commonly TCP throughput is more higher then UDP. But linked test result is UDP is more high.
I don't know why..

Question3
Which company's minipci card used? PCI express? or MINIPCI?
Can you recommand 3X3 minipci card for outdoor?
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Interesting tests. Here is our test of 3x3 MIMO on RB800:


Taken from here: http://mum.mikrotik.com/presentations/P ... 012-PL.pdf

Like macgaiver pointed out above, TCP loopback test is very misleading and doesn't show actual performance. You would need to test through the device with actual traffic, or iperf.

Further on in the article they show that doing this actually gives good results, as opposed to loopback test.

what cards? what dishes? what distance!

2. 3X3 X 4unit may cause RF interference and it occur low throughput.
did you have test or data about these related test?

You will not find 3x3 cards for MiniPCI. I have tested three simultaneous 3x3 cards with Atom motherborad. Problem is with interferences on pigtails betewan cards, remeber that with this configuration there is 9 pigtails in the box (with low rf power it worked good). On RB800 you can put only one 3x3 card (there is only 1 MiniPCIeX slot)

Question2
Commonly TCP throughput is more higher then UDP. But linked test result is UDP is more high.
I don't know why..

How you get such results (TCP test better than UDP???)

Question3
Which company's minipci card used? PCI express? or MINIPCI?
Can you recommand 3X3 minipci card for outdoor?

I have tested several AR9380/90 cards i.ex: HP, Sparklan, Tp-Link. As I said before there is no real 3x3 card for MiniPCI. I can recommend the TL-WDN4800 cards. Here is a small sample: More info about above motherboard you can find here:
https://www.cyberbajt.com/en/news/6/0/mimo_3x3.html