Diamond Multimedia ATI AMD Radeon HD 6770 1GB GDDR5 PCI-Express Graphics Card 1 DVI/HDMI/1 Display Port Eyefinity 6770PE51GB GPU: ATI Radeon 6770 Bus Type: PCI-Express X16 (PCI Express 2.1) Dynamic power management with ATI PowerPlay technology 1 GB GDDR5 memory ATI Eyefinity technology ATI Avivo HD video and display technology ATI Stream technology API Support: DirectX 9.0 and 10.0, 10.1, 11.0 Open GL3.2 and Display Formats: 2 x DVI + 1 x HDMI + 1 x Standard Display Port