source - http://arstechnica.com/gaming/2012/0...ndows-version/In a new blog post that was published this week, Valve revealed that its Linux port of the popular title Left 4 Dead 2 (L4D2) now outperforms the Windows version of the game on a high-end test rig. The OpenGL-based Linux port of L4D2 runs at 315 FPS, the Direct3D-based Windows version runs at 270.6 FPS, and the OpenGL-based Windows version runs at 303 FPS