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.

Nvidia's back in the game a little more here, as the 9800 GTX XXX Edition hangs right with the Radeon HD 4850, in both single-card and dual-GPU configurations. The GeForce is even faster at 2560x1600. However, the Radeon HD 4870's performance has to be disconcerting for Nvidia; it's quicker than the GTX 260 in all but the highest resolution, and even there, the 4870 is less than three frames per second behind its pricier rival.

Two 4870s in CrossFire, which also cost less than a GeForce GTX 280, are miles head of anything else we tested.