ATI has taken the title with single core designs, using its lower overhead drivers. However, with the new DX10 hardware and the updated platform, the GeForce 8800GTX and GTS pull in some amazing frame rates. Within the traditional gaming range resolutions of 1024x768 to 1600x1200, the GeForce 8800 based cards outperform the ATI flagship.
ATI had a "bug" in their Catalyst 6.10 driver when utilizing 4x antialiasing with Doom 3: the driver would default back to 2x. ATI says this was fixed in 6.11, and we used the new driver to get a correct reading of the Radeon X1950XTX's performance.
One final thing we would like to point out in the Doom 3 results is that the game is still "CPU bound" at 1024x768 for Nvidia DX10 hardware. The scores are bottlenecked by what the CPU can deliver to the graphics subsystem. This is not the case for the DX9 hardware.