The Witcher: Enhanced Edition
The G92 architecture can’t do anything in this game to oppose the Radeon HD 4850. The gap is 19-20% irrespective of the resolution whereas the maximum growth in average speed at the overclocked frequencies is no higher than 6%. Moreover, there is a gap in terms of bottom speed which may affect your playing comfort in heaviest scenes of the game.
The Elder Scrolls IV: Oblivion
The overclocking effect can only be observed at 1920x1200 in open scenes. Otherwise, the Radeon HD 4850 and the three versions of GeForce 9800 GTX+ are equal to each other. The game is unable to benchmark modern graphics cards adequately, so we are going to replace it with Fallout 3 which runs on a similar but improved engine.