PowerColor PCI-Express Video Card (AX6450 1GBK3-SH) Chipset: Radeon HD6450; Engine Clock: 625 MHz; Video Memory: 1GB DDR3 Memory Clock: 667 MHz x 2; Memory Interface: 64-bit; Bus: PCI-Express 2.1 x16; RAMDAC: 400 MHz; Max. Resolution: 2560 x 1600 Connectors: VGA; DVI; HDMI; Thermal: Fanless Support Microsoft Windows 7/Vista/XP; Support ATI CrossFireX Technology; Support ATI Stream Technology; Support ATI Avivo HD Technology Support ATI Hyper memory Technology; Support ATI PowerPlay Technology; Support HDCP - High-bandwidth Digital Content Protection; Support Microsoft DirectX 11, Shader Model 5.0 and OpenGL 4.1