G80, Geforce 8800 GTX is very CPU dependent
 

If you test 3Dmark06 with a 1000MHz overclocked Core 2 Quad or Duo you get 11300 marks. But when you test the same card, same test on a same non overclocked CPU at 2.66GHz the situation completely changes.

You score about 8000+ with a single card, almost identical to our score with 7950 GX2, the two GPU card. Shocking isn't it, as you'd expect more? To be fair to Nvidia's latest greatest card, the Geforce 7800 GTX scores some 5200+ in the same test so Geforce 8800 GTX is significantly faster than this single GPU card but not from the dual chip one. We are sure that this is just case for 3Dmark and that games will benefit more.

I think it's rather 3DMark06 which is very CPU dependent... how will it do in a real game (Crysis?) comparing 2.6Ghz vs 3.6Ghz Core 2 Duo... that would be interesting.

and if that would let loose the dogs of speed , that would mean a true full upgrade (ram/cpu/mobo/gpu would indeed be needed)