Doom 3

Curiously enough, the performance of the single GeForce 7900 GTX almost equals the performance of the single GeForce 7800 GTX 512. The big difference in their GPU clock rates doesn’t seem to matter anything here. The memory frequency is not a bottleneck, either, or the GeForce 7900 GTX would be slower than the GeForce 7800 GTX 512 in high resolutions. Some peculiarity of the GeForce 7800/7900 architecture we are not aware of must have led to such results.

Overall, the GeForce 7900 GTX outperforms the Radeon X1900 XTX, and the GeForce 7900 GTX SLI is faster than the Radeon X1900 XT CrossFire, except in the 14x/16x FSAA + 16x AF mode where the memory load is too high even for the GeForce 7900 GTX SLI. Anyway, this mode is playable in 1024x768.