AMD Radeon HD 6990 4GB Update - Overclocking Performance

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PC Perspective takes a look at the overclocking performance of AMD Radeon HD 6990 4GB
Just a couple of weeks back AMD released the new Radeon HD 6990 4GB graphics card to world and it was easily crowned the king of the GPU world. With performance that beat out AMD's own Radeon HD 5970 and walked past the single GPU based GeForce GTX 580 1.5GB from NVIDIA, the HD 6990 offered the most performance in the smallest space you could buy - and for a hefty $699 MSRP.

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