Pwmconfig output with nvidia control panel (note none of the temps is matching) GPU temps? This means, I either get to monitor GPU temps via fancontrol or fix incorrect RPM measurement when using the GPU header. What can I do to make the fans spin w.r.t. Using this option, I've stumbled upon fancontrol which seems quite promising for my use case, but as of right now when setting up the sensor which should be monitored I do not find the GPU Temp sensor. Although I would prefer this option as the GPU will do all the PWM handling, I cannot pinpoint the issue and fix the incorrect fan speeds. The layout of the cable prevents me from using pin 2, so I am forced to use pin 6, which seems to be faulty because nvidia-smi reports fan speeds of 0% although the fans are spinning. I would therefore have to connect the fan PST header to pins 1,3,4 and 2 or 6. The GTX uses a 6pin header with PIN 1,3,4 connecting PWM,Ground,+V to the fans and PIN 2,6 being the tach signals of the fans.

Connecting the open fan header to the header on the GPU.Connecting the open fan header to a SYS_FAN / CHA_FAN header on the motherboard.

There are 2 possibilities (both fans connected via PST): Now both fans work properly but I'm unable to figure out how to correctly regulate their speeds. I removed the old fans and replaced them with 2 Arctic P12 PWM PST in a similar, zip-tie based fashion, as shown in this video. The graphics card's fans were not working properly anymore and wobbled around which caused inconsistent cooling behavior. I received an older PC from my friend which is equipped with an MSI Nvidia GTX 970.

Ubuntu fan speed