Right now the 7950GX2 , with 1GB memory pownz all cards PERIOD, under XP OS ,
The 8800GTX with 768MB will pown all cards PERIOD, under Vista along with DX10 engine game, However D3D9 games; the 7950GX2 and 8800GTX will perform the same, and you will not see difference. However with the 1GB of memory the GX2 has, will come in handy to load in high rez texturez in games like Doom 3 , and you will never get a stutter !
Soo basically heres what it comes down to. Do you use XP or Vista
If you use XP, its pointless to get a DX10 card,
If you use Vista, "U need to say asta la vista to uncle billyz new junk OS" then its pointless to get a 7950GX2 cuz it cant do DX10
gl,