Dell OptiPlex 990 Tower Computer PC, 3.40 GHz Intel i7 Quad Core Gen 2, 8GB DDR3 RAM, 500GB SATA Hard Drive, Windows 10 Home 64 bit (Renewed) | StackSocial
Amazon.com: Dell OptiPlex 990 Mini Tower Desktop Intel Quad Core 2nd Gen. i7-2600 3.40GHz 16GB DDR3 RAM 256GB SSD DVD-RW WiFi Bluetooth Microsoft Windows 7 Professional 64-Bit : Electronics
Refurbished: Dell OptiPlex 990 SFF Desktop Intel Quad Core i7-2600 3.4GHz 8GB DDR3 RAM 500GB HD DVD-RW WiFi Microsoft Windows 7 Professional 64-Bit - Newegg.com
Dell Optiplex 990 Flagship Premium Business Desktop Computer (Intel Qu – DirectNine - Europe