Amazon.com: Dell Optiplex 390 Desktop PC - Intel Core i3-2120 3.3GHz 8GB 1.0TB DVDRW Windows 10 Pro (Renewed) : Electronics
UC DELL OPTIPLEX 390 Sous Windows 10 - Core I3 - Ram 8 Go - N° 103110 - GRADE B
Solved: 390, CPU upgrades? - Page 4 - Dell Community
Dell Optiplex 390 SFF Desktop CPU
Amazon.com: Dell Optiplex 390 Tower Business High Performance Desktop Computer PC Wi-Fi (Intel Quad-Core i5-2400 up to 3.4GHz, 8GB DDR3 Memory, 2TB HDD, DVD, Windows 10 Pro 64-bit HDMI (Renewedd) : Electronics
CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 390 Ddr3 Dimm - A69 at Amazon.com