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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.