Telsa K20c Fan speeds....

Hey everyone.

At my university, we have some machines with GTX580’s and a few with BRAND NEW Telsa K20c’s.

The machines with the Telsa K20c also have a GTX580 but NOT in SLI.

The machines are dual booting both Linux and Windows and I can access and run applications on both cards and everything is fine.

From installing the K20c, I noticed it’s REALLY LOUD. Usually the GPU fans slow down after POST but the Tesla in my case stays at 100% (or what I think is 100% since it sounds like GTX580 sounds at full fan)…

It’s really making me nervous. Any advice is MUCH appreciated. Thanks guys.


You should be able to check fan speed with NVIDIA Inspector in Windows OS… I don’t remember if I was able to set the fan speed, however. Make sure the computer power supply is good/providing adequate power.

Thanks for the reply. I’ll check the fan speeds tomorrow. The nvidia-settings in Linux reports it having a fan speed at 30% but I find that hard to believe. I will test nvidia-inspector tomorrow in Windows.

The power supply is 1000w and is powering both a GTX580 and the Tesla along with a Xeon and a single hard drive.

Anyway, thanks for the tip, I’ll report back soon.


So in Windows, I see both cards in Device Manager and I can access both of them via my CUDA programs. BUT nvidia inspector will only let me look at / modify the GTX580 that I used for display.

Any more pointers?


Oops… my memory must be bad, I think I remember that being the case also… probably because it’s using TCC mode, but since this card doesn’t have any outputs I don’t think you can change the mode.

Try something like:

nvidia-settings -a [gpu:0]/GPUFanControlState=1 -a [fan:0]/GPUCurrentFanSpeed=xx

where xx is the fan speed under Linux.


You can use nvidia-smi to check FAN speed of Tesla on Linux OSes and Windows 64bit OS.