When comparing X800Pro and X800XT at default speed, the X800XT scored about 8% higher in 3D Mark 2001SE. It is interesting to note that the overclocked X800Pro (525/1230) is head to head with X800XT (520/1120) at default. Remember the latter has 4 more pixel pipelines? This is why the overclocked X800Pro isn't much faster despite the higher memory/core speed.



Link: HardwareZoom