CLUB3D HD4870 Overclocked Edition, GDDR5, 256 bit, 3800 MHz, 2560 x 1600 pixels, PCI Express 2.0 CLUB3D HD4870 Overclocked Edition. Processor frequency: 800 MHz. Graphics card memory type: GDDR5, Memory bus: 256 bit, Memory clock speed: 3800 MHz. Maximum resolution: 2560 x 1600 pixels. DirectX version: 10.1, Dual Link DVI. Interface type: PCI Express 2.0. Cooling type: Active