VR Zone reports AMD's Radeon HD 7990 may debut in the second half of this month but heard that it will be a very limited edition. The card will feature two Tahiti XT GPUs with 6GB GDDR5, and some special editions could reach a whopping 12GB GDDR5!
By default, AMD has the advantage in terms of 50% more video memory (GTX 690 has 4GB), significantly higher memory bandwidth and the new Turbo mode, technology similar to the Turbo mode used on NVIDIA Kepler-based cards with a few major differences.
Our sources are telling us that the boards are starting to be sampled, all in preparation for the product launch in the second half of July. We will release more details as the launch day approaches, as well as the final retail price, which still isn’t decided as we write this story. While we know AMD's press deck, the company has a long tradition of changing the price at the last moment.