8GB KIT (4 x 2GB) for Dell Optiplex 380 780 Mini Tower 780 Small Form Factor 780 XE Small Form Factor. DIMM DDR3 Non-ECC PC3-8500 1066MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
Dell Optiplex 990 DT Intel Core i7-2600 3.4GHz 4GB RAM No HDD No OS
DELL Optiplex 990 Tower Computer PC, Intel Quad-Core i7, 1TB HDD, 16GB DDR3 RAM, Windows 10 Home, DVD, WIFI, USB Keyboard and Mouse (Used - Like New) - Walmart.com
RAM 4GB - Dell OptiPlex 990 SFF (Small Form Factor)
Dell OptiPlex 990 Desktop Computer i5 2nd Gen 3.2GHz 8GB RAM 500GB HDD Wi-Fi w/19" Monitor Windows 10 Home