I don't think Gainward's 8600gt at 625 MHz GPU is low ... read some other threads about how much fps ppl got from radeon x1300 or x1600 :| I can't even run a 2d game proper , this is not about gpu.
I also said I have both xp and vista installed
and btw gsdx 0.1.7 is build for vista's directx 10
Desktop VGA Charts - Tom's Hardware
for cpu charts

(mostly oced, sli and extremely high-end vga cards , but u get the point )