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
Optiplex 780 DT, upgrading ram help - Dell Community
Dell OptiPlex 780 USFF Desktop Computer Intel Core 2 Duo Processor 8GB RAM 1TB HDD Windows 10 Pro PC