The Radeon X1900 XT remains the best high-end-class solution to run The Elder Scrolls IV: Oblivion. Although the GeForce 7900 GTX ensures the same or a slightly higher average frame rate in comparison with ATI’s product, the latter has two times the number of pixel processors (48 against 24) and provides a much higher minimum frame rate as the result. The min frame rate is no less important than the average speed since the game’s behavior in dynamic, graphically complex scenes depends on it. From this point of view, the Radeon X1900 XT is preferable to the GeForce 7900 GTX in the numerous dungeons and buildings as well as in the open vistas of Tamriel’s Cyrodiil province (the difference is especially noticeable in the latter case, amounting to 100% and more).
The same is true for the Radeon X1900 GT and the GeForce 7900 GT, but it’s the former card’s having fewer texture-mapping units (TMUs) that makes the difference here. There’s little between these two cards in closed environments, but as soon as you go out into the open, the GeForce 7900 GT is suddenly far faster. At least, that’s how it goes in the resolution of 1280x1024 pixels where the average speed of both graphics cards isn’t impressive, so heavy this game is. You can’t use higher display resolutions on your Radeon X1900 GT or GeForce 7900 GT, let alone on a Radeon X1800 XT, because their speed would be too low for comfortable play.
So, if The Elder Scrolls IV: Oblivion is among your favorite games, you should choose among graphics cards on ATI’s Radeon X1900 series processors. Radeon X1800-based products suit but little for this game because they have too few pixel processors.