(In reply to fin4478 from comment #3) > You need to have a kernel command line parameter and c is used to commit > changes. See: https://wiki.archlinux.org/index.php/AMDGPU#Overclocking Yes, I use "c" to commit changes, the GPU frequency can always be modified, but the voltage does not take effect. I use parameters: # echo s 1 974 825 > /sys/class/drm/card0/device/pp_od_clk_voltage # echo s 2 1096 850 > /sys/class/drm/card0/device/pp_od_clk_voltage # echo s 3 1218 875 > /sys/class/drm/card0/device/pp_od_clk_voltage # echo s 4 1340 900 > /sys/class/drm/card0/device/pp_od_clk_voltage # echo s 5 1462 925 > /sys/class/drm/card0/device/pp_od_clk_voltage # echo s 6 1584 950 > /sys/class/drm/card0/device/pp_od_clk_voltage # echo s 7 1584 950 > /sys/class/drm/card0/device/pp_od_clk_voltage # echo c > /sys/class/drm/card0/device/pp_od_clk_voltage