PowerColor AX4890 1GBD5-HM. Maximum resolution: 2560 x 1600 pixels, Processor clock speed: 850 MHz, Graphics adapter RAMDAC: 400 MHz. 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: 3.0