Product Detail Genuine Dell Motherboard For Optiplex GX520 Desktop Systems Chipset: Intel 945G Express; Processor: Socket 775, Intel Smithfield Pentium D, Intel Prescott Pentium 4, Intel Celeron; Memory: 2x 400/533 MHz DDR2 SDRAM, 4 GB Max Total Audio: Integrated 2.1 AC'97 Sound; Video: Integrated Intel GMA 950 Expansion Capabilities: 1x PCI 32bit, 1x PCI 32/64bit Peripheral Interfaces: 1x SATA Connector, 1x VGA Monitor Connector, 1x Serial Connector, 1x Parallel Connector, 1x RJ45 Ethernet/LAN Port, 6x back-panel USB 2.0-compliant connectors, 3x back panel audio connectors . The "Genuine Dell Intel 945G Express Socket 775 Motherboard For Optiplex GX520 Desktop Systems Part Numbers: UG982, RJ291" is best product for you. We recommended Genuine Dell Intel 945G Express Socket 775 Motherboard For Optiplex GX520 Desktop Systems Part Numbers: UG982, RJ291