None that I know of, but you must remeber that 512mb of video is overkill for most games of today and if the game doesn't need that much than the card won't use that much. But if you are still see lag on the games at max settings than...
Holy crap I have ordered my sager 9750 from viciouspc in mid July, and didn't recieve it until 9/8 but now its finally here . Here are my sweeet specs.
1680x1050 WSXGA screen
Special edition Camo Paintjob...
sager hands down, way better prices and way better customer service. If you're trying to impress people by having an alienware it won't last long, so don't bother spending the extra $ for a brand that just reveals itself more.