Here's how to run Elden Ring with actually better performance than Windows:

- Use the latest Proton-GE or Proton Experimental (and switch to its bleeding edge branch). That fixes the anticheat and it includes patches to work around the shoddy DX12 logic in the game.

- If you're running on RDNA2, you might want to install mesa 22 or the latest git version. This is crucial for the best performance.

- On most AMD cards, it's worth trying to force the GPU frequencies to max. For some reason the GPU doesn't stay in high perf mode and it's a cause of frame drops.

The game stutters a bit on Windows and frame rate is inconsistent, while I have stable 60 fps on 4k Maximum quality on Linux. I've played 6h non stop today.