Quote Originally Posted by stuffme View Post
^^ I was coming to that as well. I'm wondering, if ps4 apu is gcn2.0 based, so is it also pixel/triangle cruncher like these new 290x cards? Even though the peak performance in terms of tflops isn't that great, but if it has 90% pixel triangle power than gcn1.0, it wouldn't be suprise why it's so muchs faster than people think.
PS4 has 1152 sp with 8 ACE, 2 geometry engines, 2 rasterizers, 256 bit memory at 5.5Ghz (176 Gb/s), 8 RBE (render back end) and 32 ROPs. actually PS4 has 1280 sp (same as HD 7870) but two are disabled for yield reasons. R9 290X has 2816 sp , 8 ACE, 4 geometry engines, 4 rasterizers, 512 bit memory at 5 Ghz (320 Gb/s), 16 RBE (render back end) and 64 ROPs. there is no commonality except for the 8 ACE. AMD has used the work they did for 8 ACE for PS4 on the R9 290 cards.

R9 290X is a beast of a GPU. This chip doubles HD 7870 aka Pitcairn in every aspect and in sp count goes to 2.2x. I wouldn't be surprised to see R9 290X double the perf of HD 7870 as HD 7870 gets close to 1.9x the perf of HD 7770 for a similar doubling on every aspect. that should put its perf around 10% faster than Titan. since Titan (875 mhz)is clocked lower than R9 290X (1 ghz) we can expect Titan would on average be the same perf/clock compared to R9 290X.