Here’s another thread that’s about the same issue (temperature on the CRS326):
http://forum.mikrotik.com/t/crs326-24g-2s-rm-fans/111316/1
And here someone has made more pics and wrote about the internals of the device HW:
https://tikguy.wordpress.com/2017/08/17/meet-the-crs326-24g-2srm/
What I don’t understand is: in the above link the author writes
Beneath the heatsinks we will find the CPU [Marvell 98DX3236A1 BTD4 Prestera DX series > dual > core ARMv7 CPU] and three Marvell 88E1680-LKJ2 energy efficient ethernet PHY transceivers to break out the 24 GE ports. The PHYs are loaded with nice features, like …
But the MiktoTik specs page ( https://mikrotik.com/product/CRS326-24G-2SplusRM ) says:
Specifications
Details
Product code CRS326-24G-2S+RM
Architecture ARM 32bit
CPU 98DX3236
CPU core count 1
CPU nominal frequency 800 MHz
Dimensions 443 x 144 x 44 mm
License level 5
Operating System RouterOS / SwitchOS
Size of RAM 512 MB
Storage size 16 MB
Storage type FLASH
Tested ambient temperature -40°C to 60°C
Problems / Differences / Inaccuracies / Questions:
- Is it a dual core CPU or a single core? Is there a RouterOS command to verify this?
- My device and the device of Zacharias (also gogarianto, angriukas, nfored from the other thread) are operating at a temperature near/above 70C whereas the specs above says “Tested ambient temperature -40°C to 60°C”. So there is indeed a heat problem then, isn’t it?
And look at this interessting info in the other thread:
http://forum.mikrotik.com/t/crs326-24g-2s-rm-fans/111316/1
He says “Mine was running about 67 at idle in a full 6u network rack. I installed a fan and it went to 37 under load,”
So, I would conclude that this device requires a cooling fan.