MSI R4850 512M Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card PCI Express 2.0 Compatible with 512MB GDDR3 1986MHz Memory RADEONHD 4850 956 million transistors on 55nm fabrication process PCI Express 2.0 x16 bus interface 256-bit GDDR3/4/5 memory interface Memory interface: 256-bit Memory Clock Speed: 1986MHz Engine Clock Speed: 625MHz Stream Processing units: 800 Texture Units: 16 Full support for Microsoft DirectX 10.1 Shader Model 4.1. OpenGL 2.0 Display Output (Max Resolution): 2560 x 1600. (2x) Dual Link DVI Support. HDMI/ HDCP Compliant. TV-Output S-Video