Quake 4
In order to make sure we pushed the video cards as hard as possible, we enabled Quake 4's multiprocessor support before testing. We used the game's "playnettimedemo" to play back our gaming session with the game engine's physics and game logic active.

Ooh. Ahh!

Nearly all of the multi-GPU systems tested deliver playable frame rates at 2560x1600, and the single 8800 GTX's 52.5 FPS is plenty fast, as well. For what it's worth, the 8800 GTX in SLI clearly outpaces the quad SLI system based on dual 7950 GX2s, though both are more than fast enough. Typically, quad SLI is held back by the three-buffer limit in DirectX 9, but that's not a problem in the OpenGL-based Quake 4. Even so, the 8800 GTXs in SLI in are faster.