Call of Duty
Call of Duty resembles RTCW: Enemy Territory in gameplay, but uses a more advanced engine with pixel shaders support. When no advanced graphics features are enabled in 1024x768, performance in Call of Duty is limited by central processor. However, since the game is pretty heavy even for high-end graphics cards, the GeForce 6800 Ultra starts to show its muscle already in resolutions of 1280x1024 and higher.
The workload gets higher with FSAA and AF turned on, but the GeForce 6800 Ultra doesn’t seem to feel it even in the highest resolutions. The RADEON 9800 XT, efficient at executing pixel shaders, takes the second place.