Hello @kczereczon, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/4#issuecomment-840057986.
proton experimentalx1 2021-05proton6.3-3x1 2021-05
New update of proton experimental have regression in my opinion eg. in skyrim Se the frame rate went down to 20 in open world in caves to 50 fps, when before it was stable 60 FPS no metter what I was doing (platinium in my opinion).
Quickfix:
Change proton version from experimental to proton6.3-3
CPU: Intel Core i5-2400 - cpu usage was the same
GPU: RX480 8GB
RAM: 16GB - ram usage was the same
I found out that other guy have the same issue:
