Originally posted by John Reynolds
Carmack isn't going to spend time programming these multiple paths if the plan is to ship the game without them. This is just again a situation wherein ATi made a very smart design decision by supporting 24fp -- good IQ and good speed. NV30 is either speed, 16fp, or IQ, full 32fp, with the caveat, as Carmack himself has noted, most users won't notice the differences between 24fp and 32fp but they sure will notice the performance difference.
Fair enough, but we still have to look at if NVIDIA will improve fp32 performance with so called "improved driver compiler technology." But knowing the way NV's been going lately, it's probably going to be a matter of too little, too late.