CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 790 Ddr3 Dimm - A66 at Amazon.com
Restored Dell Optiplex 790 Desktop Computer PC Intel i3-2120 3.3GHz 4GB Ram 250GB Hard Drive Windows 10 Professional (Refurbished) - Walmart.com
Restored Dell Optiplex 790 Windows 10 Pro Desktop PC Tower Core i5 3.1GHz Processor 8GB RAM 1TB Hard Drive with DVD-RW- Computer (Refurbished) - Walmart.com