I just upgraded from a 1080ti to a 7900xt last month and I just plugged it in and it worked. Then I uninstalled the Nvidia binary drivers and libraries.

I get between 35-60 FPS on high with a Ryzen 3600X and a RX7900 XT at 1440p. I’m only medium sized right now but it’s not worth complaining about. As I get bigger I’ll just turn settings down if they haven’t patched performance.

It does seem like VRAM is important, gputop shows using around 12GB.