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's Fastest Radeon Yet, Fury X2 Features Two Full Fledged Fiji XT GPUs And A Terabyte Of Memory Bandwidth
The Rise and Fall of Multi-GPU Graphics Cards | TechSpot
The Rise and Fall of Multi-GPU Graphics Cards | TechSpot