Ah well gaming. Then you need the nvidia driver, because the nouveau driver have just basic power management (thanks to nvidia). That means it will not clock up and stay on base clock.
The driver? Yes…
cd /etc/X11/xorg.conf.d/
sudo mv 21-radeon.conf 21-radeon.conf.old
sudo systemctl restart display-manager.service
Keep in mind: It will restart the whole desktop environment. That is possible because nvidia must be explicitly called in the xorg confs to work. If not called then the open source driver will take place.
Yes, if gaming is a thing then you have to configure it like that:
To be clear: It is an example and you have to adjust it to your system.