I've used 2 brand new nvidia geforce 2 gts cards with 64megs of ram, because I thought one of them was the problem. It ends up i call microsoft and they think its my aureal vortex thats the problem. So I am getting sent a creative soundblaster live to try in my system. The problem I have been having is that any game that seems graphics intensive has been freezing on me without fail. When I took my sound card out it seemed to have fixed the problem at first, but it just took longer for the games to freeze up. I think that maybe it had something to do with a conflict with the two cards, but now I don't know. I was using a Leadtek Winfast card, and now I have an ABIT Siluro. Neither seemed to make any difference. If you have any suggestions please let me know.