Sapphire RADEON HD 3870 512MB GDDR3 PCI-E. Graphics processor: Radeon HD3870, Maximum resolution: 2560 x 1600 pixels, Processor clock speed: 775 MHz. Graphic adapter memory: 512 MB, Graphics adapter memory type: GDDR3, Memory bus: 256 bit. Interface type: PCI Express. DirectX version: 10.1, Shader model version: 4.1, OpenGL version: 2.0. Minimum RAM: 1024 MB, Minimum system power supply: 450 W