Dell OptiPlex GX520 Pentium 4 3.0GHz 1GB 80GB CDRW/DVD XP Professional Desktop
Refurbished: Dell Optiplex GX520 Small Form Factor - 2.5GHz Intel Celeron Processor - 2GB Memory - Windows 7 Home Premium (1 Year Warranty) - Newegg.com
Dell WG233 OptiPlex GX520 Mini Tower DCSM Socket T LGA775 Motherboard | 0WG233 | Socket T (LGA 775) | Team Spares