XFX GeForce 8400GS 256MB On Board Supporting 512MB DDR2 PCI-E. Graphics processor: GeForce 8400 GS, Maximum resolution: 2048 x 1536 pixels, Processor clock speed: 450 MHz. Graphic adapter memory: 256 MB, Graphics adapter memory type: DDR2, Memory bus: 64 bit. Interface type: PCI Express. Shader model version: 4.0, OpenGL version: 2.0. Compatible operating systems: Microsoft Windows Vista