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DELL Optiplex 790 Desktop Computer PC, Intel Dual-Core i3, 160GB HDD, 4GB DDR3 RAM, Windows 10 Home, DVD, WIFI, 19in Monitor, USB Keyboard and Mouse (Used - Like New) - Walmart.com
Dell OptiPlex 790 SFF – Specs and upgrade options
How To Upgrade/Replace the RAM in Dell Optiplex 790! - YouTube
How to add RAM on DELL OptiPlex 790 Slim Desktop - YouTube
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 790 Ddr3 Dimm - A66 at Amazon.com
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Dell OptiPlex 790 Desktop Computer PC, 3.20 GHz Intel i5 Quad Core Gen 2, 4GB DDR3 RAM, 250GB SATA Hard Drive, Windows 10 Professional 64bit (Renewed) | StackSocial
Dell Optiplex 790 Tower Computer PC, 3.20 GHz Intel i5 Quad Core Gen 2, 16GB DDR3 RAM, 2TB SATA Hard Drive, Windows 10 Home 64 bit (Renewed) | Entrepreneur
4GB DDR3 Memory Upgrade for Dell Optiplex 790 PC3-10600 240 pin 1333MHz Desktop RAM (PARTS-QUICK Brand) at Amazon.com
2GB Memory Upgrade for Dell Optiplex 790 MT/DT/SFF DDR3 PC3-10600 1333MHz DIMM Non-ECC Desktop RAM (PARTS-QUICK Brand) at Amazon.com
4GB DDR3-1333 (PC3-10600) RAM Memory Upgrade for The Dell Optiplex 790 USFF (Genuine A-Tech Brand) at Amazon.com