How to limit perfomance level

Graphics / Linux Linux
1

Hi there!
I’m trying to limit perfomance level of my gpu when on AC to have a quiet gaming sesh.
setting different values in /etc/modprobe.d/nvidia.conf

options nvidia NVreg_RegistryDwords="PowerMizerEnable=0x1; PowerMizerDefaultAC=0x3; PowerMizerLevelAC=0x3; PowerMizerLevel=0x3; PerfLevelSrc=0x3322;"

i’m not sure if all those variables even exist or i made them up from different posts on stackovevrflow and this forum. like PowerMizerLevelAC - is it really used or i assumed its name from PowerMizerLevel adding AC
at this point i feel lost and none of the values seem to have any effect.

I’ve read that OverrideMaxPerf was silently obsoleted in one of the driver updates so its not even an option.
Ubuntu20.04 driver 515.65.01
gpu 1650M (TU117M)

what combination of these magical words should i use to limit power level on AC to powerlevel 0?
please help

2

Instead of fiddling with those ancient, unreliable parameters, please rather check whether your gpu supports nvidia-smi -lgc, e.g.
nvidia-smi -lgc 300,300
to lock the clocks on-demand.

1 Like
3

wow the command actually worked despite whats said in the man that it only supported on Volta+ which are like professional not consumer gpus.
running nvidia-smi -q clocks give me reading close to what i set with -lgc, just 5Mhz more for some reason. Is that the place i should look to monitor frequencies, i guess powermizer settings in nvidia-settings gui doesn’t give actual information when you lock frequency in this way

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