Hi All,

I have a nice new T640 that I use as a file server, but I also have a graphics card (nVidia GTX 1650) in it for occasional terminal use. Given that it's an unrecognized card I'm using ipmitool to quiet down the main fans (had to downgrade iDRAC to 3.30, as I couldn't figure out how to install racadm on Debian Stretch). So far, so good.

The only problem is the PSU fan. Somehow, somewhat randomly, after a while it goes into what sounds like 100% power, and never gets out of it. I can control everything else, but I couldn't find anything about the PSU fan.

Is there any way to control the PSU fan? It's not running at 100% from the beginning, at some point some logic must decide that it's time to turn up the volume, and seems to never revisit that decision. The way it is right now it is just too noisy and pretty usless.

Thanks!