If you use Wine to play DirectX 9 games, try the d3d9 fork. It's a fork with patches that give a much increased performance with DirectX 9 games which aren't merged into the Wine mainline because of the usual bikeshedding reasons. I use it to play WoW and I get better performance than on Windows.
https://packages.gentoo.org/packages/app-emulation/wine-d3d9