Alien vs Predator
In Alien vs Predator benchmark, the single card ASUS EAH6850 managed 39.3 fps. With the extra ASUS ENGTX 460 TOP added, the score shoots up to 67.9 fps giving it a 72.7 % boost in 3D performance.
On the ECS P67H2-A system, a similarly configured system managed to score 38.2 fps with a single card and 67.8 fps using Hydra mode.
Again, we see that in game benchmarks, the AMD system is able to match a higher end Intel P67 with Hydra.