NOTE: If the system somehow breaks, this can be used to restore the backup file.

NOTE: Appending this parameter will give “full control” of the GPU.

• This will allow more advanced options to be chosen for Voltage, GPU min/max frequency, and Memory speed.

NOTE: On a Fedora or openSUSE distro use:

sudo grub2-mkconfig -o /boot/grub2/grub.cfg

NOTE: To allow changing the performance, this has to be set to manual control.

• If not, then the following error will be seen: Invalid argument errors when writing clock values of you don't.

NOTE: The available power_dpm_force_performance_level settings other than manual are:

• auto: Drivers chooses automatically.
• low: Forces the lowest possible clock and locks the GPU there.
• high: Forces the highest possible clock and locks the GPU there.
• profile_standard, profile_min_sclk, profile_min_mclk, profile_peak: “When the profiling modes are selected, clock and power gating are disabled and the clocks are set for different profiling cases.
  • This mode is recommended for profiling specific work loads where you do not want clock or power gating for clock fluctuation to interfere with your results.
  • profile_standard sets the clocks to a fixed clock level which varies from asic to asic.
  • profile_min_sclk forces the sclk to the lowest level.
  • profile_min_mclk forces the mclk to the lowest level.
  • profile_peak sets all clocks (mclk, sclk, pcie) to the highest levels.

NOTE: Ensure that the file path is correct per the previous command to discover the path.

• The values for the clock speeds and voltages will also be different for each GPU.
• To undervolt, change each P-State voltage for core and VRAM to be less than the default values.
• The clock speeds might be able to be kept the same, but in some cases this will also have to be reduced.
  • This is where stability testing and benchmarking the GPU comes into play/

NOTE: The default values can be reset:

echo "r" > /sys/class/drm/card0/device/pp_od_clk_voltage