MSI ATI Radeon HD6670 1 GB DDR5 VGA/DVI/HDMI PCI-Express Video Card R6670-MD1GD5 Chipset: Radeon HD6670 Engine Clock: 800 MHz Video Memory: 1GB DDR5 Memory Clock: 4000 MHz Memory Interface: 128-bit Bus: PCI-Express 2.1 x16 RAMDAC: 400 MHz Max. Resolution: 2560 x 1600 Connectors: VGA; DVI; HDMI Thermal: Fansink(Dual PWM Fans) Support Microsoft Windows 7 Support ATI CrossFireX Technology Support AMD Stream Technology Support Blu-ray and HD DVD Support HDCP - High-bandwidth Digital Content Protection Support Microsoft DirectX 11 and OpenGL 4.1