We looked at the Source benchmark a few weeks ago and compared a reference 6800 Ultra to a reference X800XTPE and found that on the drivers available at the time the difference in performance was rather large in favour of the Radeon. With the latest WHQL drivers from both ATI and Nvidia and retail cards we can see that this difference in performance is still evident. With everything maxed out the Radeon is as much as 35% ahead however the Geforce does still show a respectable (and perfectly playable) 54fps. At lower settings the difference in performance does close however the 6800U is never able to catch the X800XTPE.