Nvidia GPU not powering down

I have the amd-nvidia-hybrid-prime drivers installed, when i run ‘nvidia-smi’, the card is drawing 10w of power, with /usr/lib/xorg process running, i enabled Runtime D3 power saving(my card supports it) to shut it off but it doesn’t seem to work, btw i’m running wayland.

Try XFCE 21.1.6 live-cd,you will find nvidia power consumption is very low(see from electric power-meter).But after I intstall it on my hard disk,Nvidia card seems work in P8 mode and using more power.I still finding way to solve this problem