Unfortunately the problems with the PCI Express cards from NVIDIA still persist in this game, so it wouldn’t be fair to compare the PowerColor to the GeForce 6600 GT. The difference between the PowerColor X700 PRO and the X700 XT performance equals about 15%.
The difference between the RADEON X700 XT and the X700 PRO is about 10-12%, although the load on the graphics memory is higher. The RADEON X800 XL is 1.5-2 times faster than the mainstream solution, as it actually should be.
The RADEON X700 XT breaks away from the PowerColor X700 PRO on the Piranesi map, but that’s hardly noticeable in the “pure speed” mode, especially in low resolutions.
There’s the same 10-15 percent of difference between the two versions of the RADEON X700 in the “eye candy” mode.