GIGABYTE GeForce GT 220 1GB DDR3 PCI Express 2.0 DVI-I / HDMI / D-Sub SLI Ready Graphics Card, GV-N220OC-1GI Features DVI-I / HDMI / D-Sub outputs Microsoft DirectX 10.1 with Shader Model 4.1 Core Clock: 720MHzMemory Clock: 1600MHz GIGABYTE HD Experience Series Ensure top-notch compatibility and performance with OpenGL 3.1 Optimizations GIGABYTE HD Experience Series Core Clock: 720MHzMemory Clock: 1600MHz Ensure top-notch compatibility and performance with OpenGL 3.1 Optimizations Microsoft DirectX 10.1 with Shader Model 4.1 Features DVI-I / HDMI / D-Sub outputs