DirectX 11 has quickly become the new standard for PC games and the majority of game developers chose to develop their DirectX 11 games on AMD Radeon graphics cards.
The Ultimate Visual Experience: As AMD’s most advanced DirectX 11-capable GPU, AMD Radeon HD 6900 series graphics offer a single high-performance solution for a realistic visual experience. Increased memory for higher image quality: With 2GB of video memory serving as the new standard for graphics card frame buffers, gamers can enjoy superior quality graphics without needing to increase the memory footprint, even at extreme resolutions. Intelligent tessellation: The AMD Radeon HD 6900 series of graphics cards features dual 8th generation tessellation units, delivering up to 2.9x tessellation performance compared to ATI Radeon HD 5870 graphics. The time to upgrade is now: Gamers looking to move to a DirectX 11-capable GPU will find there has never been a better time to upgrade, with the AMD Radeon HD 6970 offering up to 2.5 times the gaming performance of 2008’s similarly priced high-end graphics solution. New AMD PowerTune technology: Designed with intelligent power tuning features, including the introduction of enhanced power containment, the AMD Radeon HD 6900 series automatically adjusts GPU power draw by dynamically controlling clocks speeds, allowing gamers advanced performance inside of the power envelope they specify. So, what else is new with the Radeon HD 6900 series? Note: For more details on this change, here's a great post over on which covers the changes. A smaller die means less power drawn by the GPU, which means less cooling, which means greater performance per Watt. What VLIW4 offers over VLIW5 is about a 10% die space saving. Does this change boost performance? Well, not really. 
While previous chips had relied on a shader architecture called VLIW5 (Very Long Instruction Word 5), the Radeon HD 6900 series moves onto VLIW4.
This release is important for AMD, because for the first time in a very long time (since the HD 2900 which was released back in 2007) we see a massive revamp of the underlying architecture as relates to shaders. Today sees silicon giant AMD officially announce the newest members of the AMD Radeon HD 6000 series graphics card lineup - the AMD Radeon HD 6970 and AMD Radeon HD 6950 enthusiast products.
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