Even as NVIDIA is taking its own sweet time to complete building its lineup of DirectX 11 compliant GPUs to target all market segments, AMD, which got a 6 months' headstart into releasing its lineup, which ended up targeting all market segments in a span of 5 months, is readying the Radeon HD 6000 series for launch well within this year. Just as the Radeon HD 5000 series GPU family was codenamed Evergreen with its members codenamed after evergreen trees (such as Cypress, Juniper, Redwood, Cedar), the Radeon HD 6000 is codenamed "Southern Islands", with its members codenamed after islands in the Caribbean (not islands in the Mediterranean).
"Bart" (after Saint Barthélemy island) is the codename for the performance/upper-mid segment GPU, a successor to the "Juniper" Radeon HD 5700 series. "Cayman" (after Cayman Islands) is the enthusiast GPU, successor to Cypress, and will go into making SKUs that succeed the Radeon HD 5800 series. Finally, the king of the hill is codenamed "Antilles" (after Antilles Islands), it is the dual-GPU SKU that makes use of two Cayman GPUs, successor to the Radeon HD 5970 "Hemlock". AMD partners will be in a position to sell graphics cards based on these by November 2010. The Radeon HD 6970 "Antilles" should be out by December 2010. The lower-half of the family will likely release next year.