Whilst the R300 core features eight DirectX9 pixel pipes and four Vertex Shader units, despite the smaller silicon process not everything made it across to RV350. Essentially RV350 is half an R300 core, with only four pixel pipes and two Vertex Shading units. The reductions in size, though, means that this is able to scale to higher speeds than the R300 could, with the 9600 PRO product shipping at 400MHz core speed, thus offsetting some of the fill-rate and triangle rate advantage that R300 has in its 9500 PRO guise.