Outdoors, the scenes are way too much for lesser cards. Even for these cards, as the resolutions go up, their frame rates go down. Indoors, like many other games where there is not a lot to render, the system and CPU become the bottleneck in performance. Here we can see where the Radeon X1900XTX can take the Nvidia cards until that magic 1600x1200 resolution. At that point the GeForce 7950GX2 takes the lead and holds on to it throughout the remainder of the Oblivion tests.