PowerColor ATI Radeon HD4650 1 GB DDR3 VGA/DVI/HDMI PCI-Express Video Card AX4650 1GBK3-H - Retail Chipset: Radeon HD4650 Engine Clock: 600 MHz Video Memory: 1GB DDR3 Memory Clock: 900 MHz(2x 450Mhz) Memory Interface: 128-bit Bus: PCI-Express 2.0 x16 RAMDAC: 400 MHz Stream Processing Units: 320 Max. Resolution: 2560 x 1600 Connectors: VGA, DVI, HDMI Thermal: Fansink Support ATI CrossFireX Technology Support ATI PowerPlay Technology Support ATI Avivo HD Video and Display Platform Support Microsoft DirectX 10.1, Shader Model 4.1 and OpenGL 2.0