"On a bleeding edge system with an ATI X1900XTX video card, Oblivion is silky-smooth and its graphics appear almost photo-realistic. To assess how well Oblivion plays on a more typical machine, pay particular attention to the video card (something you didn´t need to do so much with Morrowind, which was very CPU-dependent). The video card must be no more than three years old (Nvidia FX or better), and becasue Oblivion relies a great deal on pixel-shaders, more recent cards will be much better, as they handle shader instructions more efficiently. Gamers with older supported video cards will have to sacifice some visual fidelity by tweaking graphical options (viewing distance, shadow rendering, and so on) to sustain a decent performance level. In my opinion, the best bang-for-the-buck Oblivion upgrade is an ATI X800 video card."
En substance, les carte qui ont plus de 3 ans ne serviront à rien, on s´en doutait, et les cartes récentes qui gérent efficacement les shaders (3) seront à priori les + efficaces. ET ce d´uatant plus que le jeu est apparement plutôt dépendant de la carte que du processeur.