Nvidia A100 overclock on Linux

I have encounter an problem when overclocking A100 GPU on Linux 18.04 for mining ether.
I set cool-bits to 28 and then use
nvidia-settings -c :0 -a ‘[gpu:0]/GPUGraphicsClockOffset[3]=100’
to overclock 100MHz of pclk of GPU. But after that i see no difference of pclk in nvidia-smi dmon.
Is there anything wrong of my process?

Use

GPUGraphicsClockOffsetAllPerformanceLevels

Thanks for your help, but after i did that. it said it is read only.
image

The Xserver needs to run as root to be able to set memory-clocks/gpu-clocks/fans. If that doesn’t work either, the A100 doesn’t support overclocking.