XFX 650 Watt Xxx Edition Grey Hefty amount of RAM on-board - 4GB of high-speed GDDR5 (5.0 Gbps/256-bit) Memory AMD CrossFireX multi-GPU technology provides dual-card performance scaling Speed up applications and enjoy brilliant video with AMD EyeSpeed visual acceleration Get amazing Eye-Definition graphics with DirectX 11 technology Get immersed in gaming, productivity and entertainment on up to six displays simultaneously with Eyefinity Technology