The smi commands get lost after reboot if you just typed them into the console
@amrits:
You can try out to force the GPU to the idle frequency. In my system the issue then appeared within minutes.
sudo nvidia-smi -lgc 300,300
After reboot setting is lost.
@elialbert: In my experience persistence mode turned on or off didn’t matter. I tried both variants. PM mode is useful if you have more than one GPU in your system.