Rumor website FUD Zilla heard AMD plans to release the Radeon HD 6950 and Radeon HD 6970 "Cayman" graphics cards on December 15th:
The HD 6970 should ship in decent quantities and we also heard that Radeon HD 6950 should also launch on the 15th, but in somewhat lesser quantities.
Our sources indicate that Geforce GTX 580 should end up faster than Radeon HD 6970 at least in many of the popular benchmarks. The fact that AMD is pricing Cayman cards a bit lower than the 580 lends a bit more credibility to such claims. We have also heard that driver was one of the reasons of this “slight” delay of Cayman launch, and we guess that part of the story is that Geforce GTX 580 ended up much better than ATI expected.
Additionally, the site also received some pricing information. The Radeon HD 6970 is said to cost $450, while Europeans will have to pay between 429EUR and 449EUR, depending on the country. The price of the Radeon HD 6950 is still unknown but it could be around 300EUR to 350EUR, if not less.