Now for the only results gamers really care about. Keep in mind both chipsets are running SLI enabled GeForce 8800 GTX graphics cards at maximum visual settings as permitted by each one of the games.
The X3: Reunion test gave the 680i SLI a 3fps advantage at 1600x1200 (4% performance increase). Prey on the other hand favored the 680i SLI chipset by just 1fps at 1600x1200. Quake 4 also saw small performance gains as the 680i SLI produced just 2fps more than the 650i SLI chipset. Finally we have Company of Heroes where both chipsets allowed for an average frame rate of 167fps!