Well firstly X800s are SM2 cards. Not SM3. The Core clock on the 7900 is 450, over your 400. And the ram is GDDR3, meaning its going to be rated at least 1.5Ghz.
On top of that for some reason Nvidas cards are generaly faster in the FPS sence. I suspect arcitecture (sp?) of the chip itself combined with drivers that actualy WORK.
For example a 6800 clocked at 325/700. 8 pipes & 5 shaders its faster than an X1600 clocked at 500/800 with 12 pipes and 5 shaders
Yes, which is faster?
On top of that for some reason Nvidas cards are generaly faster in the FPS sence. I suspect arcitecture (sp?) of the chip itself combined with drivers that actualy WORK.
For example a 6800 clocked at 325/700. 8 pipes & 5 shaders its faster than an X1600 clocked at 500/800 with 12 pipes and 5 shaders
Yes, which is faster?