Originally Posted by Roaches
Looking at the far bottom left on that image I see:
128*32 = 4096 4G
64*32 = 2048 2G
32*32= 1024 1G
Must be a very huge die if it really has 4096 Stream processors.
I believe that's something like 128MB per chip * 32 chips = 4096MB VRAM in total, 64MB * 32 chips = 2048MB, etc. Stream processors aren't generally grouped like that, other than on an architectural level, which I doubt would be of that much concern to AIBs.
Originally Posted by wstanci3 I'm certainly no expert, so I would appreciate someone correcting me or adding to my explanation
, but I will try to give me guess. If we were to take the rumor that the 9970 will have 512 bit bus memory, 4096 sp's, 48 rop's, etc... we would have an amazing card. If the card's process is indeed 28nm, as is the 7970, then that is even more astonishing. But it comes at a cost: Die size. The current die size is 365mm^2.
The 9970's die size would have to be massive to accommodate all those rumored specs. I hope that amd launches a product that can compete with the 780 (at the least) for $600, but I am honestly very skeptical.
Doesn't AMD also have a new High Density Library technology that is supposedly equivalent to a full node shrink in size and power reduction? With that, a 4096sp 512bit flagship might be feasible, even without 20nm.
Also note that a 2560sp GPU could almost certainly compete with GK110, which could be done with a relatively minimal die size increase over Tahiti (~400-420mm^2, I think). 4096sp would make it equal to or faster than the 7990, which is significantly faster than the 780 and Titan (when Crossfire scales well, at least).