Supermicro X9DR3-F-B Fan control

[Apolinar Zaragoza]

I recently upgraded to this motherboard Supermicro | Products | Motherboards | Xeon® Boards | X9DR3-F from this Supermicro | Products | Motherboards | Xeon® Boards | X10SL7-F the issue i'm having is that the fans will speed up all of the sudden then they will slow down. It does it non stop no matter if i set the ipmi fan speed to Optimal. The work around i came across was setting the bios under cpu performance to energy efficient. I did change it back to performance after the fans would stay at optimal speed which i thought was weird. But after a reboot they went back up to spinning up fast then slow , and once again i had to change the cpu performance to energy saver. Is there a reason why this is happening and is there a solution to be able to run the cpu's on performance mode without running into this problem?

 

[skelleton]

It might be an issue with the fan speed.
If check the lower fan speed limits for warning and critical in ipmi.

The fans on fan channels 1-4 will spin at 30% in optimal and the ones on the auxiliary channels (FAN A and FAN B) will spin at 25%
If the fan speed on these settings is below the lower critical limit, IPMI will speed up the fans to 100% for a short time.

 

[Apolinar Zaragoza]

@skelleton is there a way to by pass this I do use some noctua so those spin at a much lower speed.

 

[skelleton]

You should be able to set your own treshholds with ipmi.

 

[Apolinar Zaragoza]

Is there a tool or program I use for this? I'm quite new to all this stuff so if i could be pointed in the right direction that would be great. Thank you in advance. By the way I'm using Unraid on my setup.

 

[skelleton]

I use ipmitool on linux, but I don't remember the specific commands to set the fan thresholds, you have to google that.