VisionTek Radeon HD 2400. Graphics processor: Radeon HD2400, Maximum resolution: 2560 x 1600 pixels, Processor clock speed: 520 MHz. Graphic adapter memory: 256 MB, Graphics adapter memory type: DDR2, Memory bus: 64 bit. Interface type: PCI. DirectX version: 9.0, Shader model version: 4.0, OpenGL version: 2.0. Compatible operating systems: Windows Vista/XP