AMD is working on three more graphics cards, the Radeon HD 7900

In addition to the new dual-processor Radeon HD 7970 "X2" and a pair of non-reference HD 7970 samples we expect three new products in the line of Radeon 7900. This is despite the fact that AMD and its partners have not yet said nothing about the Radeon HD 7990.

It was learned that the company intends not only to replace the already present on the market fee on the basis of crystal "Southern Islands", but also to introduce new models. The first of these, of course Radeon HD 7990 - potentially the most powerful graphics card in the world. In addition to her company plans to release a model of the Radeon HD 7970 GHz Edition, as well as the Radeon HD 7930. 

On the Radeon HD 7990 yet unknown, but the board is likely to rival the GeForce GTX 690. Model Radeon HD 7970 will come into direct GHz duel with the GTX 680. As for the HD 7970, this fee will be based on the crystal Tahiti LE - a shortened 28-nm graphics chip Tahiti. New take place between HD 7870 and HD GHz Edition 7950.

Portal 3DCenter.org said that the announcement of HD 7990 moved to August, HD 7970 GHz Edition will be available in June, and the release of HD 7930 to be held in late June - early July. 

Source: 3dcenter.org