It's strange, but "Nexuiz" (windowed) under Wine runs at same performance/speed as "Nexuiz" for Linux, but CPU usage in Wine even little less compare to last one. btw, "Nexuiz" not use wined3d at all and only pure opengl32 :) Anyway it's funny why in Windows the game show less of CPU load and little more FPS (more stable and smooth). So, maybe Linux Nvidia video driver can affect on it?