Sapphire Radeon HD 6870 1 GB DDR5 DL-DVI-I/SL-DVI-D/HDMI/Dual Mini DP PCI-Express Graphics Card 100314-2SR PCI-Express 2.0 x16 bus interface 256-bit DDR5 memory interface Microsoft DirectX 11 Support Microsoft Windows 7 Support ATI Eyefinity Technology, support up to 3 displays