Genuine Dell OptiPlex 745 Series Intel Socket LGA775 Ultra Small Form Factor (USFF) Systems Desktop Motherboard GW726 0GW726 CN-0GW726.Dell Part Number: GW726 0GW726 CN-0GW726Compatible Part Numbers: KG317 0KG317 CN-0KG317 MM621 0MM621 CN-0MM621 PK096 0PK096 CN-0PK096Compatible Models: Dell OptiPlex 745 SeriesSpecifications:Chipset: Intel Q965 ExpressSupported Processor: Intel Pentium 4 Pentium D Celeron Core processorSocket LGA775Supported Memory: 533 or 667 MHz DDR2 SDRAM Slots4GB Max TotalAudio: Integrated ADI 1983 High Definition AudioVideo: Intel Graphics Media Accelerator 3000 with integrated DVI-I with dual-monitor supportPeripheral Interfaces:1 - Serial Port1 - Parallel Port1 - DVI Port1 - DA-2 Adapter Port1 - 10/100 Ethernet LAN Port7 - USB 2.0 Compliant Ports (5 back panel, 2 front panel USB ports)2 - Back Panel Connectors for line-in, line-out, and microphone; 2 Front Panel Connectors for Headphones and Microphone