I think SLI is just a waste of money, i would just buy a 7900GTX or keep the X1900XTX. everyone with SLI just has tooo much money, or wastes money, and dosent know anything about it and think that scince it's 2 cards it's double the performance but it's not. but on the anandtech charts on F.E.A.R. one 7900GT dose half of 2 7900GT's in SLI so it's getting better.