CPU fan speed can't go over a certain frequency

[Naweap]

Hello,

I'm currently stress testing the hardware components of my new TrueNAS SCALE.

I'm running a CPU stress test to make sure everything is ok. However, when the CPU fan is trying to increase its speed, it seems to be stuck and can't go over a certain frequency.

When the fan mode is set to "Optimal" to automatically manage the speed based on the CPU load, it speed up for a few seconds and then slow down automatically. And it keeps going like this indefinitely.

I've also noticed some errors from the motherboard admin interface:

I've tried other mods and everything works has expected. I'm only facing the issue on the "Optimal" mode:

My hardward is:

• CPU: Intel Xeon E-2236
• CPU fan: be quiet! Pure Rock 2
• Motherboard: Supermicro MBD-X11SCH-LN4F

Thanks in advance

 

[Redcoat]

Take a look here: https://www.truenas.com/community/resources/fan-scripts-for-supermicro-boards-using-pid-logic.24/

 

[Naweap]

Thanks for your reply. I will come back to you if needed.