Gigabyte ATI Radeon HD5670 OC 1 GB DDR5 VGA/DVI/HDMI PCI-Express Video Card GV-R567OC-1GI REV2.0 - Retail Chipset: Radeon HD5670; Engine Clock: 790 MHz Video Memory: 1GB DDR5; Memory Clock: 4 GHz; Memory Interface: 128-bit Bus: PCI-Express 2.1 x16 ; RAMDAC: 400 MHz ; Max. Resolution: 2560 x 1600 Connectors: VGA; DVI-I, HDMI ; Thermal: Fansink ; Support Microsoft Windows 7 Support ATI CrossFireX and Avivo HD Technology ; Support HDCP - High-bandwidth Digital Content Protection ; Support Microsoft DirectX 11, Shader Model 5.0 and OpenGL 3.1