Amazon.com: Desktop PC Computer Compatible with Dell OptiPlex 990, Intel Quad Core i5 3.1-GHz, 16GB RAM, 1TB Hard Drive, DVD-RW, USB WiFi Adapter, Windows 10 Professional (Renewed) : Electronics
Amazon.com: Dell Optiplex 990 Desktop Computer (Intel Quad-Core i7-2600 up to 3.4GHz, 16GB RAM, 2TB HDD, WiFi, VGA, DisplayPort, (Tower w/ HDMI), Windows 10 Professional - (Renewed) : Electronics