I think they run about the same. FO3 is more optimized to load on the fly and feels smoother, but after some 10k RPM drives i never had loading pauses in Oblivion. 1280x720, 2xAA, 8xAF, mostly med-high settings. I first played oblivion on a 9800pro and the x1950 was like night and day. p4 @ 3.6ghz 1GB DDR@466 x1950 512MB WD Raptors