Gigabyte GV-R465OC-1GI Radeon HD 4650 Video Card Chipset: Radeon HD 4650 Video Memory: 1GB DDR2 Memory Interface: 128-bit Bus: PCI-Express x16 (Support PCI-Express 2.0) RAMDAC: 400 MHz Streaming Processor: 320 Max. Resolution: 2560 x 1600 Connectors: VGA, DVI-I; HDMI Thermal: Fansink Support ATI CrossFireX and Avivo HD Technology Support HDCP - High-bandwidth Digital Content Protection Support Microsoft DirectX 10.1,Shader Model 4.1 and OpenGL 2.1 RoHS Compliant