Rumor: AMD 6xxx Series GPUs Slated for November
For the most part, AMD's 5xxx series of GPUs have stood up well against the competition,and that includes Nvidia's Fermi architecture. If the Sunnyvale graphics chip maker wanted to, it could probably sit on the sidelines for the rest of the year and still remain competitive.
That isn't in AMD's cards, so to speak. Citing "sources from graphics card players," Digitimes says you can expect AMD to start shipping videocards built around its next-gen GPU -- codenamed Southern Islands -- in November, with an official announcement preceding the launch a month ahead of time. This new GPU will come manufactured on a 28nm process. The original plan was to make these upcoming chips using a 32nm manufacturing process (and called Northern Islands by AMD), but Taiwan Semiconductor Manufacturing Company (TSMC) ended up skipping its 32nm R&D and jumped straight to 28nm.
Around the same time, and perhaps even earlier, AMD is said to be cutting prices for its ATI Radeon HD 5000-series graphics cards, both in preparation for the upcoming 6xxx series, and to fend off Fermi from chewing into its market share.

Imge Credit: pcpop.com