Dell OptiPlex 780 USFF Desktop Intel Core 2 Duo 3.0 GHz 4 GB RAM 250 GB HD DVD Win Pro 32-Bit - Island Trade Post
Optiplex 780 DT, upgrading ram help - Dell Community
Solved: Optiplex 780, ram upgrade - Dell Community
Refurbished: Dell OptiPlex 780 USFF Desktop Intel Core 2 Duo E8400 3.0GHz 4GB DDR3 RAM 250 GB HD DVD-RW WiFi Bluetooth Microsoft Windows 10 Pro - Newegg.com