Curacao - 2304 stream processors, 144 TMUs, 48 ROPs, 384-bit
Tahiti – 2048 stream processors, 128 TMUs, 32 ROPs, 384-bit
12.5% increase Sp and TMU’s while a 50% jump in ROP’s
Hainan - 1792 stream processors, 112 TMUs, 32 ROPs, a 256-bit
Pitcairn – 1280 stream processors, 80 TMUs, 32 ROPs, a 256-bit
40% increase Sp and TMU’s while no bump in ROP’s
Just as reference, while "Bonaire" wasn’t actually GCN 2.0 (completely), it probably entailed some of the "learned" improvements.
7790 - 895 stream processors, 56 TMUs, 16 ROPs, 128-bit
7770 - 640 stream processors, 40 TMUs, 16 ROPs, 128-bit
40% increase Sp and TMU’s while no bump in ROP’s. That see's a 20-25% in performance, while a 20% lower Perf/watt from the 7770.
Given that the GTX760 is 20% faster performance, though better Perf/watt by 18% with a 7870 Pitcairn; if what "Hainan" GCN 2.0 offers as enhancement above what "Bonaire" provided with its' 40% bump, a 9870 clocked at 1Ghz and then with Boost should in theory be above the GTX760, while still improved on perf/watt. Then consider "Hainan" would be about 28% smaller die, could AMD offer more than the normal "one-up’s-mans-ship" at $250?
"Curacao" with 12.5%, but that huge jump it ROP’s might be all AMD needs to un-leash the Tahiti from Nvidias’ moniker of "we expected more". 12.5% might not move the TDP up drastically, offering a "Curacao LE" (HD 9950) enough oomph to bounce the GTX770, while then "Curacao XL" gets some strong jabs on the GTX780, with nowhere near the price, while not much more on power than Tahiti.
Then is Volcanic Islands for Q1 2014... erupts on Titan?