Brand: Dell Part Number: PJ149 Alternate Part Number: DF131 YH405 MH415 U8811 JD961 KG317 Type: Motherboard Chipset: Intel Q965 Express Supported Processor; Intel Pentium 4, Pentium D, Celeron, or Core processor Socket: Socket 775 Supported Memory: Two 533 or 667 MHz DDR2 SDRAM Slots 4gb Max Total Audio: Integrated ADI 1983 High Definition Audio Video: Intel Graphics Media Accelerator 3000 with integrated DVI-I with dual-monitor support Expansion Capabilities: SATA 1.0a and 2.0 Peripheral Interfaces: 1x Serial Port 1x Parrallel Port 1x DVI Video Port 1x 10/100 Ethernet LAN Port 2x front-panel and 5x back-panel USB 2.0–compliant connectors 2x back-panel connectors for line-in/ microphone and line-out; 2x front-panel connectors for headphones and microphone Compatible Model: Dell OptiPlex GX620