We’re still CPU-bound under 4xAA. The game also has a very high graphics setting, perhaps we should have tried that to push the GPU’s harder. Turning on 4xAA didn’t result in the huge hit in performance you normally expect to see. At 16x12 the GeForce 8800 Ultra for instance delivered 39 fps without AA and 36 fps with 4xAA, a performance hit of just 8%.