Quote Originally Posted by Solus Corvus View Post
In Cypress (and back to R600) there were 5 SPUs (Stream Processing Units) per SP (Streaming Processor).
Like in the first image here: http://www.anandtech.com/show/2841/4
Now there will be 4 SPUs per SP. And as ajaidev points out, there may be a different arrangement of simple and complex units within the SP instead of 4+1.

If they keep a grouping of 16 SPs per SIMD, and there are 1920 SPUs, then Cayman will have 30 SIMDs per chip.

The reason for such a change might be to increase utilization. It could have good results if one or two of the units in your 5 wide design are usually sitting idle. That's why RV770 and Evergreen had such a huge difference between low utilization (games) and high utilization (furmark) in terms of power-draw and heat output.


They have had a 5-wide design for a while now. Why assume that's never going to change? Especially on a generational change?
Quote Originally Posted by informal View Post
Effectively,Cayman could have 50% more SP resources than Cypress,taking into account the grouping per SIMD. If the clocks stay in the range of Cypress,this thing will be the fastest single GPU card on the market,hands down. Now,how will they manage to put two of those monster for Antilles card and keep "reasonable" TDP is another question.
What about low ROPs listed? Wouldn't that still be a bottleneck?