Is it possible to SLI a 7950gx2 and a gtx260?I believe that the 7950gx2 is two 7950gtx cards in one. Thus making it the same "type" of card. On the Nvidia website it says you can SLI TWO XXXX gtx cards together but doesn't specify if you are able to SLI the GX2 series with a GTX. Or in my case the gtx260.