Good evening HotHardware fans! We've taken NVIDIA's and ATi's flagship video cards, the GeForce 6800 Ultra and the Radeon X800 XT Platinum Edition, and tested them across various Doom 3 maps using all custom time demos, as well as a multiplayer deathmatch demo. We've also loaded up the recently released Counter Strike Source and its Graphics Stress Test and taken readings at medium and high resolutions, with various image quality settings.