Dell H8052 Optiplex GX520 LGA775 Motherboard. Dell meets the current and future demands of high performance, power embedded computing, making it ideal for communications, transaction terminal, interactive client, industrial automation applications as well as for standard home use. 

Manufacturer: Dell
Part Number: H8052 0H8052 CN-0H8052
Dell Compatible Part Numbers: WG233 0WG233 UG980 0UG980

Specifications:

6 x USB Ports
3 x Audio Ports
Serial Port
Parallel Port
RJ-45 (LAN)
VGA Port

Compatible Models: 

Dell Optiplex GX520 Desktop Series