I doubt that whats go gr8 in 7950 GX2 nd multi GPU can be seen od some 1 year old cards. Remember some old Digit's GCard stootout in which there was a Gainward card with 2x6800GT linked with SLI on SINGLE PCB. Then why this 7950 has 2 PCB? And even if it has 2x512 MB only 512 is available[as said in that review that both mem chips holds same date]. Then is nvidia that stupid? After all they have underclocked the GPUs nd mem also.
Also as bout perfomance there is not really a big margin b/w 7900GTX nd 7950...considering there is 2x7900 GPU in it. Its sure 2x7900GTX or even GT standalone cards in SLI would do more than that.
Anyway why quarell bout a dream...