Quote Originally Posted by Lightman View Post
There was a rumor Caymann is the biggest GPU AMD has ever made. If you include 420mm2 R600 then it will be close to 2xBarts size.
On top of that it seems like Cayman has a lot more architectural changes compared to Cypress than Barts! Most people are expecting new shader organization + number of other novelties.
I don't think the larger size will be a real concern; 40nm has pretty much been mastered now. As for uArch, I don't think it'll be majorly different from Barts. Upgrading the uArch for Barts was enough of an investment, which means that Cayman will probably feature (on-chip) high-end/professional features (double-precise float-point, for example) and perhaps a new memory controller as well.

I'm looking forward to proper numbers and a real comparison between Cypress, Barts, & Cayman.