With enabled FSAA the advantages of the overclocked RADEON 9800 over the Pro version gets smaller, and the overclocked NVIDIA GeForce FX 5900 even loses it completely in all resolutions above 1024x768. It is probably bigger amount of graphics memory and its dual-bank working mode that tell here.
As soon as we enable anisotropic filtering, the overclocked graphics cards dash forward. RADEON 9800 appears the fastest in this race, due to faster anisotropic filtering algorithms, which, however, provide not very high image quality.
Under the heaviest workload the overclocked ATI RADEON 9800 is still ahead of the RADEON 9800 Pro. The overclocked NVIDIA GeForce FX 5900 starts falling behind its faster Ultra version in higher resolutions where the memory bus workload grows up.