Benchmarks: Crysis Warhead
Using Fraps we recorded a 2-minute passage from the level "All The Fury" to measure performance in Crysis Warhead and we were able to reproduce almost exactly the same sequence each time.
At 2560x1600 with any form of anti-aliasing enabled the Radeon HD 5870 graphics cards just failed to work likely due to a driver bug. A single GeForce GTX 480 averaged 24fps, while adding a second card increased performance by a margin of 92%, with the average frame rate now reaching an impressive 46fps.
We ran an additional test with anti-aliasing disabled so we could properly test the Radeon-based boards.
With anti-aliasing disabled at 2560x1600 a single Radeon HD 5870 managed to average 28fps, matching the performance of the GeForce GTX 480. However, adding a second Radeon delivered just 32% more performance, while a second GeForce GTX 480 allowed for a much more significant 93% bump.