Solved: Dell Optiplex 745 to GX620 Please Help - Dell Community
User manual Dell OptiPlex GX520 (English - 229 pages)
Dell Optiplex GX520 Motherboard RJ291 + Intel Pentium D 3GHz CPU + 1GB RAM H8052 - The620Guy.com
Refurbished: Dell OptiPlex 380 Desktop Computer Core 2 Duo 3.0GHz 8GB DDR3 RAM 500GB HD DVD-RW Microsoft Windows 7 Professional 64-Bit Desktop Computers - Newegg.com