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AMD's Radeon HD 6990 Graphics Card - The Tech Report
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AMD Radeon HD 6990 4GB Review | bit-tech.net
AMD ATI Radeon HD 6990 4GB GDDR5 PCIe Reviews, Pros and Cons | TechSpot
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Behold the beast: the AMD Radeon HD 6990 graphics card
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Meet The 6990 - AMD's Radeon HD 6990: The New Single Card King
