Im a bit bored so im going to try and do a bit of analysis of Pitcairn and Cape Verde. Since the L2 cache of Pitcairn and CV are the same, the differences are mainly in the additional units (and of course 128 bit mem interface)
So compared to CV, Pitcairn adds 640 Shaders(10 CU's), 40 TMU's, 16 ROP's, a 128 bit memory interface and a geometry processing engine (did i miss anything?)
So all these things take up approx 2.8-1.5=1.3 billion transitors, and 212-123=89 mm2.
And given that the additional stuff is pretty much the configuration of CV, if we take CV's die, this means the L2 cache and the remaining fixed block(PCIE controller, Video decoder, VCE, Display outs, etc etc) take up 123-89=34 mm2. Now i dont know what to make of this number..and this is also a very simplistic analysis, the actual numbers could be a lot different..but like i said i was bored :smile:
So overall this kind of makes Tahiti seem a bit large in comparison to Pitcairn dosent it? Tahiti adds 768 Shaders(12 CU's), 48 TMU's, and an additional 128 bit memory interface (higher speed though), and takes 365-212=153 mm2 to do it all. Now i know the higher speed PHY's probably take up a lot more area, but it still seems like they werent as aggressive with transistor density on Tahiti as they were on Pitcairn. Pitcairn seems to have a bit over 10% greater transistor density than Tahiti.
