The 5870 beats a 470 nicely in STALKER CoP without AA. Problem is I didn't buy these cards to run games with AA off.
I was running 4xAA with adaptive AA. My reported mins were 41 and yet I got hard hitch after hard hitch.
I recently pitted a single 5870 @ 1000|1275 vs a 470 @ 1483 shader 1850 memory with 4xAA and transparency enabled, then with transparency off and 4xAA only active @ 1920x1200 below. The results look remarkably similar and I'm telling you first hand the 470 was much smoother.
Without any kind of AA active I can't feel a difference between them in STALKER CoP.
Another thing I should note is the hard hitching is not there with 5870 Crossfire using AA and transparency AA if I drop res from 1920x1200 to 1440x900. I should also note I was using "box" set from the CCC not
In the end, I care about how smooth a game plays @ 1920x1200 with AA, not if I am getting 55FPS reported instead of 65.