I feel that nvidia's performance is not as good as ATI's in this game

XFX 7900GT 256

The XFX card had to have the resolution lowered to 1600 x 900 to run Oblivion. This did still look nice but I felt that this res was a little aliased. The settings in-game for the XFX were slightly higher than the Gainward could handle and the FPS was still above what the Gainward card outputted. Gaming was smooth and enjoyable, if a little jaggy. I used HDR rather than AA in this title as it gives the game a more realistic and immersive feel. I must have missed a screen with this card, but specular dist was very slightly higher than the Gainward card.

Gainward 7900GT 512mb

The Gainward managed to play Oblivion at the same resolution as the XFX card but I had to tune down the settings a little in-game. This was a little disappointing as I like the larger view distance with the XFX card as well as some of the extra details. As before the scenes were a little jaggy but the game was playable at this resolution. The Gainward struggled ever so slightly when you walked outside to a huge scenery, but not enough to spoil the games smooth running.

Club3d 7900GTX 512mb

The 7900GTX managed to play Oblivion at 1680 x 1050. This gave far less jaggies than the GT's but then this card is a GTX chip. The in-game settings were also a bit higher and this again made the game more enjoyable. Playing on the GTX looked very nice, but I was a little disappointed that the nvidia hardware ran the game at lower settings than the ATI hardware. The X1900XTX ran this game pretty much at the same in-game settings as the GTX, but at a higher resolution of 1920 x 1200. This gives a lot less jaggies and is more enjoyable. I did run the "Chuck patch" on the ATI hardware and AA + HDR looked awesome. I had issues with this patch though so I could not include these results in the review.