Originally posted by: beggerking
You are sounding more and more like the ATI rep who talked about how SM3 is unimportant in Nvidia before ATI actually implemented it in the x1000 series.
that's irrelevant and nothing more than you trying to toss in a smokescreen to deflect the actual issue.
also, i was one of the first on these forums to have both x800 and 6800 (quite a few discussions regarding those products on this forum), and kept the 6800 due to comparable performance and additional features.
preferring the card with the most features w/o giving up performance in this generation is not different than what swayed me to nvidia last generation.
Originally posted by: beggerking
article on 3dmark test
"RADON X1800 and X1900 are not quite SM3 cards according to this test. What's the matter? The reason may be in the lack of vertex texture fetch, which is necessary for SM3 (from the point of view of all manufacturers but ATI). Or there may be a different reason (vertex shader compilation error, no necessary support for branching in vertex shaders from ATI, no pixel texture fetch, or others). It's hard to tell. But that's certainly alarming. "
I believe ATI has a software patch, but its very slow.
"The reason may be...", "Or there may be..", and
"It's hard to tell.." are hardly definitive points.
also, i should correct my earlier statement a bit. r580 did not add "vertex texture fetch", but rather something they call "Fetch4" (i believe this is what you were referring to, however it is supported in hardware instructions, not software as you stated), which allows the gpu to access four different values of adjacent texture addresses if only the value of a single parameter is needed (as is the case in most soft shadow rendering techniques).
this differs slightly from a standard texture fetch which still grabs four components, but the components correspond to the rgb and alpha values of a single address.
either way, it's largely irrelevant as there haven't been any developers out there willing to give either a try (the single exception being pacific fighters).
this is why i asked you to let us know if we're actually missing something - which since you have failed to find any examples of how we're suffering due to the lack of it, means we are not, and that the argument your are trying to make is absolutely worthless.
people benefit from not having to give up AA if they want HDR effects. no one cares whether their hardware supports "vertex texture fetch" or not, except perhaps as ammunition for arguing a worthless point.