I’m running CachyOS, and having an Nvidia card, I’m using their Nvidia-specific kernel. I know this 3060 won’t last forever, and I’m planning to upgrade to an AMD card for a better overall experience.
Is there anything I should be aware of regarding the kernel or other compatibility when switching brands? Can I simply plug in the new one and run pacman -Syu?
Sidenote: I will plan around my PSU’s output, so no need to advise regarding physical compatibility.


No problem. There’s also another handy tool here:
https://github.com/optiscaler/OptiScaler/blob/master/Spoofing.md#linux
You can spoof DLSS support and actually use FSR4 instead with games that don’t officially support FSR, quite handy.
Otherwise AFAIK the Proton command “PROTON_FSR4_UPGRADE=1” will only upgrade games officially supporting older versions of FSR.