That aint going to happen.Gerard said:Should either give you the cash back or get you to send the other card back and send you a pair of 640mb gts's.
As there is no 7900GTX repalcement cards & they are unable to fix said card, then they are entitled to send you a card of equal value / performance as you current card. The fact that it cannot work in SLI with the 2nd owned card is irrelevant.