Another indication of a rather crappy memory controller is how bad the Xabre is at dependent texture lookups. Look at the EMBM score. The current generation of video cards gets 3 times that score. The same goes for the pixel shader score. I know there is some math in the pixel shader (its a matrix multiply for a cube lookup), but the DOT3 score is fine, indicating a decent math engine.
Again, the argument I gave previously about the fillrate also points to a memory problem. I suppose things can change with another spin of silicon, but this usually just gets rid of bugs. This may be a DX8 video card, but it doesn't look like SiS really cared about a good implementation. The dependant texture lookups are pretty much the best part of pixel shaders. I suppose that'll be good news for RV250 when it comes out, assuming they both attack the same market (as SiS said).
