NVIDIA Turing/1660 Ti: forcing maximum power saving/minimum performance mode

Graphics / Linux Linux
1

I’ve always used this option and it worked with older cards however with Turing it does the opposite: it forces the GPU to stick to maximum performance:

Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x2222; PowerMizerLevel=0x3; PowerMizerDefault=0x3; PowerMizerDefaultAC=0x3"

I’ve also tried a kernel module option:

options nvidia NVreg_RegistryDwords="PowerMizerEnable=0x1;PerfLevelSrc=0x3333"

With no success.

So, how can I force maximum power saving/minimum performance mode with Turing under Linux? I’m running NVIDIA drivers 450.57. It looks like Xorg options are being ignored.

2

I’ve replaced all the Xorg options with just one kernel module option:

options nvidia NVreg_RegistryDwords="OverrideMaxPerf=0x1"

which has solved the issue for me.

My full kernel module options are: options nvidia NVreg_RegistryDwords="RMUseSwI2c=1; OverrideMaxPerf=0x1" because it’s the only way to allow i2c (gddccontrol) to work properly.