I think you meant "Binning" not "sorting", since one in O and the other O(n log n), and FWIW, the CPU only did that on PVR Series 1 chips (PCX1/PCX2).Fox5 said:and tbdr was bad because the cpu has to do all the sorting.
As for real sorting (i.e. arranging polygons in Z order) I would go as far as to say that Series 2 chips required less CPU sorting than standard renderers but you'll have to work out what I mean by that