Bah, this is becoming perhaps even more confusing than the whole X800/X850 mess. But at least it will be much more clear once the cards are actually out.
I'm honestly quite intrigued to hear about the RV560, as before, I had only heard of an RV570. I wonder what it might be? Having two separate chips for the X1700 series makes little sense to me, just as would making one of them for the X1900GTO. The numbering scheme implies that it's not, say, a new low-end chip, like an X1400. Then what could the separate chips be for?
I'm crossing my fingers (but not too tightly) that it might be that the RV570 might finally be the chip that brings the 256-bit memory interface to the mid-range market. ATi faked people out with the X1600's "ringbus" (and most people STILL don't understand it
) and nVidia dragged their feet with the 7600GT's memory configuration. (which, to its credit, still performed quite admirably in spite of its 128-bit interface)
And if it has 8 TMUs, 8 ROPs, and 24 PSUs... How will it handle compared to the X1800 series? I doubt that it might actually best it in real-world tests, though it might come close in some titles, such as the shader-hogging
Oblivion.
Then that brings us to the R580+. Personally, I feel that we'll see anything changed aside from the memory controller. POSSIBLY, the threading arbiter might change some, or some tweaks to the general layout and processing, (lessons learned from before) but largely, I'd expect to see it as simply an X1900 with faster memory, and likely higher clock speeds, due to some possible trimming of transistors, much like the R423->R480 move, and more recently the G70->G71 move.
I'd still, of course, love to see a 512-bit memory interface, but the number of pins required on the GPU for such probably means we're quite a ways from that. Then again, it could possibly be worked around, and the benefits could be worthwhile; pounding the opposition cards into dust while using cheaper memory. And I'd just like to see cards finally pass the 100GB/sec line, which will likely never come to pass unless they do use a 512-bit interface.
(oh, and finally got to post #100, so I can finally get my avatar enabled!)