Doom 3 - Heat Haze
This next demo was recorded in order to test a specific effect in Doom 3: that cool-looking "heat haze" effect that you see whenever a demon hurls a fireball at you. We figured this effect would be fairly shader intensive, so we wanted to test it separately from the rest of the game.

The "heat haze" demo shows us a similar trend. The 6600 GTs in SLI still perform very well without antialiasing, but with AA enabled, they drop back to the middle of the pack. This time, at 1600x1200 with AA turned on, the Radeon X800 XL is faster.