Originally Posted by WarheadMM
3dmark05 measures VERTEX shaders speed. ATi cards are good in vertex shaders and hence why they get a higher score. Also there is ALOT PS 2.0, 2_a shaders in it. And we all know that the FX's are slow when it comes to PS 2.0 2_A shaders
3dmark also is pixel shader limited. But geometry plays a huge role in 3dmark's performance too.
That being said, 3dmark05 Is pixel shader bound too. But its just as much vertex limited as it is pixel limited.
ALso I'd like to point out. FX cards are at their fastest when running a Shader 2.0A profile. verses a standard 2.0 path. 2.0A compiled path is optimal for the FX series.