Quote Originally Posted by Aten-Ra View Post
If cayman has 1920 Shaders then I don’t see how it will have more than 20-30% performance than HD5870.
The 4D architecture will only enable them to keep the die size smaller than 400mm2 buts shaders are shader and 1920 is only 20% more than 1600 that HD5870 has.
There you go wrong, 5D is rarely utilised fully, its easier to utilize 4D fully. So, that will bring lot of improvement.

1600/5 = 320 and 1920/4 = 480, thats 50% increase alone. Now say that Cayman SP is little underpowered compared to 5D SP of evergreen. So say there alon 40% improvement. Ofc it will eat more power if there is no improvements on that side too. Put in there tesselation improvement that will be >150% compared to evergreen. Maybe not 80% more power, but 50-60% more is very realistic approximation.