HP Nvidia GeForce 7900 GTX 512MB GDDR3 256-Bit Dual DVI S-Video PCI-Express x16 Double Height Graphics Video Card 5188-4408.Part Number: 5188-4408Specifications:Graphics Bus Technology: PCI ExpressMemory: 512MBMemory Interface: 256-bitMemory Bandwidth (GB/sec): 51.2Fill Rate (Billion pixels/sec): 15.6Vertices/Second: 1.4 BillionPixels per clock: 24RAMDACs (MHz): 400Ports:2 x DVI1 x S-Video