Sapphire Radeon HD 4670 512MB. Graphics processor: Radeon HD4670, Maximum resolution: 3840 x 2400 pixels, Processor clock speed: 750 MHz. Graphic adapter memory: 512 MB, Graphics adapter memory type: GDDR3, Memory bus: 128 bit. Interface type: PCI Express 2.0. DirectX version: 10.1, Shader model version: 4.1, OpenGL version: 2.0