Bei slashdot.org kann man nun einige Kommentare von John Carmack zu der momentanen Situation der Grafikkartenchips im bezug auf Doom nachlesen:

The standard lighting model in DOOM, with all features enabled, but no custom shaders, takes five passes on a GF1/2 or Radeon, either two or three passes on a GF3, and should be possible in a clear + single pass on ATI´s new part. It is still unclear how the total performance picture will look. Lots of pixels are still rendered with no textures at all (stencil shadows), or only a single texture (blended effects), so the pass advantage will only show up on some subset of all the drawing. If ATI doesn´t do as good of a job with the memory interface, or doesn´t get the clock rate up as high as NVidia, they will still lose. The pixel operations are a step more flexible than Nvidia´s current options, but it is still clearly not where things are going to be going soon in terms of generality. I fully expect the next generation engine after the current DOOM engine will be targeted at the properly general purpose graphics processors that I have been pushing towards over the last several years.