MuFu said:
Dave,
Do you think that there may not actually be an R350?
Instead, ATi release RV350 (currently being dev'd in Toronto I think) as the first mainstream DX9 part (DX9.1???) this coming Spring and until R400 next Summer/Fall, they stay in contention at the high end with a variant of R300 (~400MHz clockspeed, DDR-II?).
MuFu.
My initial guess MuFu is that the R300 life cycle will look similar to the R200 life cycle. In the spring of this year, ATI offered a slight "refresh" of the 8500 in the form of a 128MB BGA version (and a few companies offering parts clocked at 300Mhz). The RV250 was simply redesigned to reduce manufacturing costs.
Following this pattern, we would be led to believe that there will be a spring "refresh" of the R300, likely in the form of increased clock speeds and DDR-II memory, but nothing more. Then, in the fall, we would look for the R400, and an RV350 that is a .13u version of the R300 core, tweaked for lower transistor count (perhaps by removing some functions that were found to be unused for the most part) and higher clock speeds. That would replace the 9500/9500 Pro chips as the mainstream/budget DX9 parts, being cheaper than even those two. R400 would then be a DX9.1 or DX10 part and take the new seat as performance leader.
However, as Dave pointed out, the releases of DX versions look as if they're going to really monkey with things. I doubt that R400 would be released as an 8 x 2 version of the R300 supporting PS/VS 3.0. ATI seems way too excited about the part for that to be the case. I tend to think that it will be quite a bit different than the R300, in terms of DX version (unified shaders) or perhaps basic architecture (tiler or otherwise abnormal for ATi). If so, that would probably push the release back to spring 2004, and we might see a true R350 product fill the gap next summer/fall.
Whatever... it's an interesting market now. Soon I'll know which videocard to buy, and whatever that turns out to be I'll be one happy gamer!