DELL Optiplex 790 Desktop Computer PC, Intel Quad-Core i7, 1TB HDD, 16GB DDR3 RAM, Windows 10 Pro, DVD, WIFI, 19in Monitor, USB Keyboard and Mouse (Used - Like New) - Walmart.com
8GB DDR3-1600 (PC3-12800) RAM Memory Upgrade for The Dell Optiplex 900 Series 990 (Genuine A-Tech Brand) at Amazon.com
Amazon.com: Dell Optiplex 7010 High Performance Flagship Business Desktop Computer, Intel Quad-Core i3 Up to 3.8GHz, 8GB DDR3 RAM, 500GB HDD, DVD, USB 3.0, Windows 10 Pro (Renewed) : Electronics
A-Tech 4GB Memory RAM for Dell OptiPlex 7010 - DDR3 1600MHz PC3-12800 Non ECC DIMM 1Rx8 1.5V - Single Desktop Upgrade Module (Replacement for A7398800) at Amazon.com
Amazon.com: DELL Optiplex 790 SFF Small Form Factor Business Desktop Computer PC (Intel Dual Core i3 CPU 3.3GHz, 4GB DDR3 Memory, 500GB HDD, DVDRW, Windows 10 Professional) (Renewed)'] : Electronics