GIGABYTE GeForce GT 440  1GB DDR3 PCI Express 2.0 DVI-I / HDMI / D-Sub SLI Ready Graphics Card, GV-N440D3-1GI Chipset: GT440 Engine Clock: 830 MHz Video Memory: 1GB DDR3 Memory Clock: 1800 MHz Memory Interface: 128-bit Bus: PCI-Express 2.0 x16 RAMDAC: 400 MHz Max. Resolution: 2560 x 1600 Connectors: VGA, DVI, HDMI Thermal: Fansink Support Microsoft Windows 7/VistaSupport nVidia PhysX Technology Support nVidia CUDA Technology Support nVidia PureVideo HD Technology Support HDCP - High-bandwidth Digital Content Protection Support Microsoft DirectX 11, Shader Model 5.0 and OpenGL 4.0 Minimum 400W or greater system power supply