Recap
Although individual game results are interesting, we calculated a performance index based on all tests with the same weight for each game. A score of 100 was given to the GeForce 8800 GT in 1280x1024.
On average while the GeForce 8800 GT is 10% behind the GeForce 8800 GTX, the GeForce 8800 GTS 512 is just ahead! The GeForce 8800 GT and above also finish ahead of the Radeon HD 2900 XT. The Radeon HD 3870 is just behind this last card and the "little" Radeon HD 3850 is equivalent to the GeForce 8800 GTS.
With antialiasing 4x filtering activated, the GeForce 8800 GT slightly varies its position between the GTS and GTX depending on the game. Either way, performances are still very good. The GeForce 8800 GTS 320 MB is clearly limited by its memory in this area. The GeForce 8800 GTS 512 is equivalent to the GTX in 1280x1024 but is limited by its quantity of memory in certain games in 1920x1200 placing it on average a little behind in this resolution. As for the Radeon HD 2900 XT, its bugged ROPs in terms of antialiasing forced AMD to use an alternative solution which is very flexible but it stifles performances. For this reason, the Radeon HD 3800 does relatively better despite its memory bus which is half the size. Thus on average, the 3870 is ahead of the Radeon HD 2900 XT. Nevertheless, the GeForce line always does better and the 8800 GT has a significant advantage over the Radeon HD 3800 in this area.
Note that the average scores of some cards was reduced because they aren’t capable of antialiasing in Rainbow Six : Vegas and Bioshock. However, in our opinion, excluding these games would not change the standings. You can consult this possibility
here.
In DirectX 10, the GeForce 8800 GT and 512 GTS aren’t disappointing and are still between the GTS and GTX and ahead of the Radeon HD 2900 XT. This last card is in turn is surpassed by the Radeon HD 3870.
In DirectX 10 with FSAA 4x, the GeForce 8800 GT and GTS 512 are more limited by memory bandwidth and size; however, despite everything they are still equivalent to a GeForce 8800 GTS 640 MB. In these extreme conditions, the GeForce 8800 GTX and Ultra hold an advantage while the Radeon HDs are behind.
