Unconfirmed.
Also would seem silly to use 28nm on just one card.
By the time they've cracked 28nm enough I'm sure they'll be on the 6 series not 5 series.
I was just looking this subject up last night. Now I found conflicting stories......
1st....... ATI would create a 40nm revision of the 5800 Series in the form of 5890,5830, and 5790 in 2010 while moving there production to Global Foundries. After the move was complete the 32NM 6800 series would be released to the public by February 2011.
2nd...... ATI would create a 32nm revision of the 5800 Series in the form of 5890,5830, and 5790 in 2010 while moving there production to Global Foundries. After the move was complete the 28NM 6800 series would be released to the public by February 2011.
3rd....... ATI would not be creating any new revision cards. But their Northern Island cards would be available from sale to the public from Global foundries until Q4 2010. That story did mention that ATI was on top of things and would be getting it going as soon as possible.
Personally This is what I believe ( no I am not an insider this is just my conclusion ) I think that the 5800 series will be revised in the form of a 5890 a 5950 and a 5790. I don't think that it will get a Die shrink at all. It will still be 40NM. That will start happening between February and July 2010. Of course partners will come out with their own revisions as well.
The reason I think this part is ........ You don't do a die shrink during the moving of your Fabrication.
Then I believe the 6800 series will come out in late late Q4 2010 or early early Q1 2011. Again for the reason's stated above. But I do believe that the Nod will be 32NM instead of 28NM. Again because of the move. Unless their getting really good yields. Even ATI's GPU road map says that the Northern Island GPU's will be 32NM.
http://brightsideofnews.com/news/2009/11/2/amds-next-gen-gpu-manhattan-and-northern-islands-use-32nm-process.aspx
But again this is just all my opinion it is not based in fact! I am just guessing. But from the giving knowledge so far I would say it's as good as a guess as the next guys!