This is an old revision of the document!

Ubuntu - GPU - AMD GPU - Overclocking - Increase Power on AMD GPUs

It is possible to increase the number of watts supplied to the GPU.

ALERT This will effectively overclock the GPU.

This may result in erratic behavior being seen on the system (i.e. frequent crashing).
If so, restore the GRUB file back to what it was before!

Edit GRUB Config

sudo cp /etc/default/grub /etc/default/grub.bak

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

Edit /etc/default/grub.

Change:

...
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
...

to

...
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.ppfeaturemask=0xffffffff"
...

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.

sudo update-grub
 
or
 
sudo grub-mkconfig -o /boot/grub/grub.cfg

NOTE: On a Fedora or openSUSE distro use:

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

After rebooting, check the Changes.

cat /sys/class/drm/card0/device/power_dpm_force_performance_level

returns:

auto

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.

echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level

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.