HIS HD 4870 Fan. Graphics processor: Radeon HD4870, Maximum resolution: 2560 x 1600 pixels, Graphics processor family: AMD. Graphic adapter memory: 1024 MB, Graphics adapter memory type: GDDR5, Memory bus: 256 bit. Interface type: PCI Express 2.0. DirectX version: 10.1, Shader model version: 4.1, OpenGL version: 3.1. Compatible operating systems: Windows 7