Dell OptiPlex 990 DT Intel i7-860 2.80GHz AMD 1GB GPU 2GB RAM No HDD N
CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 990 Dt/Mt/Sff, Ultra - A69 at Amazon.com
DELL Optiplex 990 Tower Computer PC, Intel Quad-Core i5, 1TB HDD, 16GB DDR3 RAM, Windows 10 Pro, DVW, WIFI, USB Keyboard and Mouse (Used - Like New)" - Walmart.com
Dell OptiPlex 990 Tower PC, 3.2 GHz Intel i5 Quad Core Gen 2, 16GB DDR3 RAM, 1TB SATA HD, Windows 10 Professional 64 Bit (Refurbished Grade B) | Macworld