I’ve only tried framegen in one game (The Last of Us remake) and it worked fine. I also have an AMD GPU if that matters.
I think with Nvidia drivers you can get DLSS working and probably framegen too, but I wouldn’t know how to set that up. Nvidia compiles both the Linux and Windows drivers using the same codebase.
Also wym by faster? Linux has less overhead than Windows does, even when using Proton, and many games perform better on Linux because of that.
EDIT: There’re also a couple of mods available that let you replace DLSS framegen with FSR 3.1 framegen: www.youtube.com/watch?v=vnXW8CzKYBw