AMD Radeon HD 6990 Dual-GPU Graphics Card Review – Techgage
AMD - What's the Best Graphics Card of 2011? According to PC Magazine it's the dual-GPU AMD Radeon 6990! Simply put, it's the fastest discrete video processing you can get! Check it
AMD Dual Graphics Settings | How To Setup Dual Graphics Cards Amd | Catalyst Control Center - YouTube
AMD Radeon Dual Graphics Cards - YouTube
ASUS Dual-Fan Radeon Rx 480 4GB OC Edition AMD Gaming Graphics Card with DP 1.4 HDMI 2.0 (DUAL-RX480-O4G)