In Oblivion we can see that image quality does not hold up under the more advanced graphics cards. The Sapphire can beat a GeForce 7900 GTX in the outdoor scene which the 8600s cannot. Here we can see the nature of the indoor scenes in regards to amounts vertex data and pixel shader data versus the demands of the outdoor scene. When there is a high demand the lightly equipped 32 unit shader core has a hard time outdoors. Indoors the 7900 GTX regains it composure as does the 8600 GTS.