Nvidia fan control

Fan speed
Drop to console with ctrl+alt F4 and type  sudo service lightdm stop to stop x server. execute script  https://pastebin.com/JZ1fnK3N  , it will set the speed of each gpu card to user specified one and return back to gui with sudo service lightdm restart

https://sites.google.com/site/akohlmey/random-hacks/nvidia-gpu-coolness#TOC-Faking-a-Head-for-a-Headless-X-Server

https://towardsdatascience.com/burning-gpu-while-training-dl-model-these-commands-can-cool-it-down-9c658b31c171

links
Nvidia cuda blade install