Sapphire Radeon HD 4550 512MB DDR3 PCI-E 1GB HM HDMI. Graphics processor: Radeon HD4550, Maximum resolution: 2560 x 1600 pixels, Processor clock speed: 600 MHz. Graphic adapter memory: 512 MB, Graphics adapter memory type: GDDR3, Memory bus: 64 bit. Interface type: PCI Express 2.0. DirectX version: 10.1, Shader model version: 4.1, OpenGL version: 2.0. Minimum system requirements: CD-ROM, Minimum RAM: 1024 MB