PowerColor PCI-Express Video Card (AX6670 1GBK3-H) Chipset: Radeon HD6670; Engine Clock: 800 MHz; Video Memory: 1GB DDR3 Memory Clock: 2x 667 MHz; Memory Interface: 128-bit; Bus: PCI-Express 2.1 x16; Stream Processors: 480; RAMDAC: 400 MHz Max. Resolution: 2560 x 1600; Connectors: VGA; DVI; HDMI; Thermal: Fansink Support Microsoft Windows 7; Support ATI Stream Technology; Support HDCP - High-bandwidth Digital Content Protection; Support Microsoft DirectX 11 and OpenGL 4.1