We used the full retail version of Prey, patched to version 1.3. All in game settings were set to their maximum apart from anisotropic filtering and anti-aliasing, which we varied for different portions of our testing. Our benchmark is based on a custom demo recorded in the Salvage level.
We ran our tests twice, once with transparency anti-aliasing and once without to see how this advanced AA technique affected performance. The lighter bars represent our results with it turned on.
Overall performance in Prey is much better than in CoD2 and all the cards maintain just about playable framerates all the way up to 1,600 x 1,200 4xAA 8xAF with transparency AA. Again, the Fatal1ty card competes well with the 8600 GTS but both are not much of an improvement over the older cards.
As with Call of Duty 2, Prey doesn't use much in the way of transparent textures so the performance impact of turning this feature on is, again minimal.