When testing with Crysis we already find that these results contradict those found when testing with 3Dmark Vantage. For starters, when running the P35 in its native 16x/4x configuration and forcing the P45 to do the same, we see a miserable 13.7% performance increase when adding a second card. Using a specially designed P35 motherboard that uses an 8x/8x setup improved this result dramatically, increasing performance by another 17.3% at 1920x1200.

The P45 chipset running its native 8x/8x configuration allowed for a 37.9% performance increase while the X38 and X48 chipsets saw a 41.3% performance boosted when running two Radeon HD 4850 graphics cards in Crossfire mode.