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'm not that optimist that AMD will break 400 mm^2 for their graphic chip size anytime in the near future, ESPECIALLY using this buggered 40 nm process by TSMC, but we'll see.

Quote Originally Posted by Bobsama View Post
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.
IMHO, you should wait for highend SKUs with completely functioning chip from the green corner before claiming that TSMC 40 nm process has been totally mastered, we got two dominant player in the graphic bussiness, not just AMD graphic division.

I got the impression that AMD might try a more aggressive stance in mArch improvement and modification using the higher end & higher priced yet lower volume Cayman compared to Bart which will be their bread & butter until 28 nm process arrive.