FarCry is optimized for NVidia, so expect problems with the X800, but other than that, I have been very impressed. Thats considering I upgraded from a GeForce 4 MX Integrated card, though. X800 is faster, but the Nvidia 6800 includes Pixel Shader 3.0, which makes for sickeningly beautiful graphics in FarCry. If you don't play too many games that bear the Nvidia logo, though, ATI is definately the logical choice.