I have NV 1060. How I can change Performance Level from 2 to 3 in Nvidia X server settings?
in 1bash set:
GPUPowerMizerMode_Adjust="YES"
GPUPowerMizerMode=3
or open a new guake tab and enter:
sudo nvidia-settings -a [gpu:0]/GPUPowerMizerMode=3
changing the number in (gpu:0) for the GPU you are adjusting.
"Valid values for 'GPUPowerMizerMode' are: 0, 1 and 2."

But in Nvidia X server settings displayed 0, 1, 2 and 3
Might need to set the powerlimit to a higher value before powermode 3 can be used.