PowerColor ATI Radeon HD4650 512 MB DDR2 VGA/DVI/HDMI Low Profile PCI-Express Video Card 512MD2-LHV2 - Retail Chipset: Radeon HD4650, Engine Clock: 600 MHz, Video Memory: 512MB DDR2 Memory Clock: 800 MHz. Memory Interface:64-bit. Bus: PCI-Express x16 (Support PCI-Express 2.0). RAMDAC: 400 MHz Stream Processing Units: 80. Max. Resolution: 2560 x 1600. Connectors: VGA, DVI, DisplayPort. Thermal: 1 Slot Heatsink 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 3.1