https://hothardware.com/reviews/his-radeon-hd-6990-4gb-review?page=4
HIS Radeon HD 6990 4GB Review - Page 4 | HotHardware
Jun 26, 2011 - HotHardware takes a detailed look at the dual-GPU powered HIS Radeon HD 6990 4GB graphics card. - Page 4
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https://www.bit-tech.net/news/tech/xfx-to-warranty-hd-6990-4gb-overclock-switc/1/
XFX warranties HD 6990 4GB overclock switch | bit-tech.net
XFX will provide a warranty for its HD 6990 4GB cards, even if the the overclock switch is enabled.
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https://hothardware.com/reviews/amd-radeon-hd-6990-review-antilles-has-arrived
AMD Radeon HD 6990 Review: Antilles Has Arrived | HotHardware
Mar 8, 2011 - HotHardware takes a detailed look at the new, dual-GPU powered AMD Radeon HD 6990 DirectX 11 graphics card.
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https://www.bit-tech.net/reviews/tech/amd-radeon-hd-6990-review/1/
AMD Radeon HD 6990 4GB Review | bit-tech.net
AMD's new Antilles-powered, dual-GPU graphics card is a monster, but does CrossFire still misfire?
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https://www.tomshardware.com/reviews/radeon-hd-6990-antilles-crossfire,2878-2.html
Radeon HD 6990: Power, Cooling, And Size--All Extreme - AMD Radeon HD 6990 4 GB Review: Antilles...
Mar 8, 2011 - Several months late and supposedly only a couple of weeks ahead of Nvidia's own dual-GPU flagship launch, AMD's Radeon HD 6990 has no trouble establishing...