I wonder if when using his GF4Ti4800, he had his quality tab (in the Nvidia drivers) set all the way on Performance. That would allow him to run games in higher quality modes because the graphics drivers would pretty much ignore alot of the games extra eye candy as it was rendering the scenes. Thus for him, it might seem to be playing just fine at higher resolutions with a little AA or AF. Whereas with his 6800GT, the freshly installed drivers probably were set on Balance or Quality settings. I still can't figure out how you wouldn't see a huge IQ difference between these cards. I mean GF4 was back in the day when ATI was leading in the IQ battles. These days, it seems Nvidia has greatly improved thier IQ since both present offerings were almost identical (if I remember correctly) and most certainly better than the GF4 generation. So surely he must notice that the game just looks nicer/more realistic, if nothing else.