Dell Optiplex 990 Tower Computer PC, 3.30 GHz Intel i5 Quad Core Gen 2, 8GB DDR3 RAM, 500GB Hard Disk Drive (HDD) SATA Hard Drive, Windows 10 Home 64bit (Renewed) | StackSocial
Dell Optiplex 990 Desktop Computer PC, 3.20 GHz Intel i5 Quad Core Gen 2, 4GB DDR3 RAM, 250GB SATA Hard Drive, Windows 10 Professional 64bit (Renewed) | MacTrast
Optiplex 990 MT RAM compatibility - Dell Community