The demo also gives us a preview of what kind of performance we can expect from the game, and here we saw the GeForce 8800 cards reigned supreme, particularly the GeForce 8800 GTX and Ultra. At 1600x1200 with 0xAA/16xAF the GeForce 8800 GTS 640MB trailed the GTX by 19%, with that gap increasing as you crank up the screen resolution. Under the increased demands of 4xAA/16xAF, the GTX pulls further away from the GTS 640MB. Here the GeForce 8800 GTS 640MB also pulls away from its 320MB counterpart. The GeForce 8800 GTS 320MB just doesn't have enough memory to run the game at the settings we chose at high resolutions of 1920x1200 with 4xAA/16xAF. And what about AMD's Radeon HD 2900 XT?

At worst, the Radeon HD 2900 XT ran about 9% slower than the GeForce 8800 GTS 320MB. This occurred at 1600x1200 with 0xAA/16xAF. As you increase screen resolution that gap narrows, by 2560x1600 the card pulled even with the GeForce 8800 GTS 640MB. With AA enabled, the 2900 XT runs faster overall than the GeForce 8800 GTS 320MB and performs anywhere from 12-15% slower than the GeForce 8800 GTS 640MB, although keep in mind that at 2560x1600 with 4xAA/16xAF the cards are only separated by 2.7 FPS in our testing. That's close enough to call it even, particularly considering the variability in our benchmark runs.

Since the Radeon HD 2900 XT is priced to compete with the GeForce 8800 GTS 640MB, some may consider this a decent showing for the 2900 XT, but we think the card is being held up a little by its driver. The X1950 XTX performs awfully close to the Radeon HD 2900 XT. CrossFire scaling needs a little more work as well.

If the rumors are true, the GeForce 8800 GTS 320MB will be replaced shortly by NVIDIA's upcoming G92 GPU. Some leaked documents suggest this card will be outfitted with more stream processors and memory than the GTS 320MB, as well as higher clock speeds: 600MHz on the graphics core (100MHz higher than the GTS today) and 900MHz memory, also 100MHz higher than the GeForce 8800 GTS. The card is expected to utilize a 256-bit memory interface versus the 320-bit interface of today's cards, but the extra stream processors, memory, and higher speeds should be enough to offset the difference.