Are they some graphic card benchmark for linux environment ? From my windows experience, drivers are important, and often underestimate. My linux gaming experience is very bad, lots of my game are unstable, and others use a lot more resources than with windows. However, when I ask people, some of them have no issue at all, even with a similar environment (Debian + Steam). I may consider buy specific graphic card to stay on linux, but I couldn't find any clue to know which one are more adapted.
Thx for your leads !
True, but I don't think it's the case for OP since he reported less performance than on Windows, so I assume he meant on the same hardware.
I think that's more of a proof that I shouldn't answer these before I've had my caffeine. Good catch!