Half-Life 2: Episode Two
We used a custom-recorded timedemo for this game, as well. We tested Episode Two with the in-game image quality options cranked, with 4X AA and 16 anisotropic filtering. HDR lighting and motion blur were both enabled.

Episode Two isn't quite as CPU-limited as Call of Duty 4, but we're still talking about frame rate averages over 70 FPS for half of the field at 2560x1600. With that caveat on the table, we can say that the 4870 X2 is again the fastest "single" card around, although it's a little slower than dual GTX 260s at our top resolution.

Notice, by the way, that two GeForce GTX 260s appear to be quicker than three. This isn't an unfamiliar sight for those of us who have worked with these exotic three- and four-way GPU configs. Sometimes, the overhead of managing another GPU isn't worth it.