CMS 4GB (2X2GB) DDR2 6400 800MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell®
Dell Optiplex 780 Windows 10 Desktop Computer Tower PC C2D 2.93GHz 4GB 1TB
Refurbished: Dell Optiplex 780 Desktop - Intel Core 2 Duo E8400 3.0Ghz, 4GB DDR3 RAM, 250GB Hard Drive, DVD - Windows 7 Professional 64 Bit - Newegg.com
Optiplex 780 memory problems | Tom's Hardware Forum
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
Dell OptiPlex 780 USFF Desktop Computer Intel Core 2 Duo Processor 8GB RAM 1TB HDD Windows 10 Pro PC
Dell Optiplex 780 DT 160GB HDD 8GB RAM Core 2 Duo E8400 @3GHz WINDOWS 10 | eBay