High idle temps on Supermicro A1SRi-2758F

kejianshi

Then you need fans. 2 of them would be nice.

stephenw10

High load but that's actively cooled, which should make a huge difference.

I thought that at first but I don't think it is. It's the passive version they're testing. The listed temperature, 48.5C, doesn't change between the tested fan speeds and there's no figure given for the fan noise. Both those lead me to believe this is fanless.

Steve

Edit: Re-reading the test setup it doesn't seem like the numbers are relevant here whether there are fans are not. These are not cpu temperatures.

diretore

Update:

Puting the case on the side and mounting a house fan next to it lowered the temps (CPU now at around 40 C).
Up next: stresstest

kejianshi

Glad to hear it. Since a fan is necessary and you will have to do the periodic cleaning anyway, I suggest mount a cpu fan.

http://www.servethehome.com/wp-content/uploads/2013/10/Supermicro-A1SAi-2750F-Rear-IO-Panel.jpg

Harvy66

Your ambient temp outside the case may be under 28c, but inside the case, it claims to be 52c(system temp). Your CPU temp is not much above the in-case temp.

diretore

Hm… none of the bootable cd live distros seem to work (kernel panic).
Is there a way to stress test my machine without installing the entire system?
Another thing I will try now is to move the HD outside of the case, as it is directly under the cpu - adding to the heat.
Installing fans is my last resort (silence is key here)

kejianshi

You can't run linux mint or ubuntu live without a kernel panic?

diretore

Sorry. Upon re-reading my post I realized what I said :)

I can boot ubuntu just fine, was talking about Ultimate Boot CD, Hirens Boot cd, StressLinux (OS boots, but cpu test tools produce kernel panic/stop the system)

kejianshi

Load ubuntu or mint - execute prime95 in stress test mode.

That should get things nice and warm for you.

P.S. This will also freeze / kernel panic if things overheat or board/memory has problems.

diretore

Update:
Strapped a big 140m Noctua fan on the case (this thing is super silent).
Now idle temps around 30C, load temps around 50C :)

Another problem arose: Noctua fans have very low RPM, causing the IPMI to report alarm/warning and flash a red LED on the board.
Is there a way to configure alarm thresholds for supermicro boards?

diretore

Changed fan thresholds with IPMItools. Now no warning is displayed but red LED is constantly flashing on the MB…