Hi!
I know that the devices are tested up to 50 deg ambient temp. Any number for max allowed CPU temp?
Cpu itself ?
Real max 80-85C I would think.
Should be somewhere in the spec sheet of that processor ?
Very good question!
I could not find any reference to the “Tj.Max” of the “Qualcomm IPQ-6010” SoC.
This limit varies by CPU type and is usually between 100°C and 105°C.
Other sources say that above 85°C there can be possible damage.
In general, it is said that it is recommended to keep the sustained (continuous) temperature below 65°C.
Mine AX2 and AX3 has aroun 60 without any load…but with complicate config
But what is the cpu idle temperature in AX2?
My AX2 has 55C when idle, is it okay?
Just checked, around 53C here.
Mine is also 53C in the UK. Co-incidence I hope, rather than a stuck temperature reading!
51C in Belgium, acting as simple wifi AP in small closet.
Mine is also 70C in the india
Hi. I made this kind of cooling. The temperature is around 45 °C. I used these fans: Sunon MF50101V1-G99-A (MF50101V1G99A)12v 0.84W 50x50x10мм 3pin. I upgraded by removing the yellow control wire and made a serial connection of the fans.
And here comes the usual question:
Do the fans blow environment air inside the thingy or do they extract (warmer) air from it?
Hi. It is pumped from the environment into the device. Fans blow on the radiator.
It’s very hot. Can you tell us how to get such a schedule?
i use librenms (snmp) to monitor all my mikrotik…
but i will use zabbix or mikrotik dude…
this is ax2 on my home…
ac2 or ax2?
Good. 
@aleab
You should give some context to it, in Italy it has been exceptionally hot end of june/beginning of july, so your graphic is not surprising.
But 65 or 66° while “hot” should not be a real risk for the lifetime of the device.
Generally speaking electronics that stays at max 55° or so and the (very approximate and conservative) rule of the thumb is that every 10° C increase you halve the life of the device, have a much longer lifetime, but the real world lifetime (for other reasons, new standards, higher speed, etc.) of a device like these is normally much less than what they can last, even at slightly higher temperatures.
Just a bit of perspective.
For these CPUs the detailed specifications are usually only available under NDA, so not publicly. The usual spec for (absmax) Tj is around 125 degC. It is usally advised to design them to run them at around 95 degC max, so the temperatures posted here are absolutely normal. The usual temperatures discussed on the internet apply to high-end (in the semiconductor manufacturing business sense) processors - for several reasons much lower limits apply to them.
Take into account that these are the temperatures of the actual Si die. The packaging has significant thermal resistance. It’s not generally known, but packaging is actually responsible for a significant portion of an IC’s cost, and therefore manufacturers try to get away with the cheapest option possible. Taking into account the fact that in these operating conditions the die itself basically doesn’t age, this is not a bad thing.
So 65 degC is a totally normal and safe operating temperature for these devices in normal (indoors, not air-conditioned) situations and is no cause for worry.
The usual rule of thumb of +10degC->half the lifetime based on the Arrhenius equation is a usual way to estimate lifetime. However this only applies to components (or their soldered connections) which actually show temperature-related aging in the operating regime. For these devices this is basically limited to the electrolytic capacitors. Fans help with this, but - as a purely personal choice - I rather choose to replace them every 8-10 years than mount a fan.
thank you to advise, but i can’t use a fan on home…
for me is fine… if ax2 have problems i change it… i hope never 
thank you
in my case in Spain where we are right now in the room at 27ºC my ax3 tells me to be at 56ºC.