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Restored Dell OptiPlex 390-T Desktop PC with Intel Core i5-2400 Processor, 8GB Memory, 500GB Hard Drive and Windows 10 Home (Monitor Not Included) (Refurbished) - Walmart.com
Amazon.com: Dell Optiplex 390 Business High Performance SFF Desktop Computer PC (Intel Quad-Core i5-2400 up to 3.4GHz, 8GB DDR3, 1TB HDD, HDMI, DVD, Windows 10 Pro 64-bit) (Renewed) : Electronics
Solved: 390, CPU upgrades? - Dell Community
Solved: 390, CPU upgrades? - Dell Community
Amazon.com: DELL OPTIPLEX 390 DT Desktop Computer, Intel Core I3-2100 3.1GHz, 8GB DDR3, 1TB, DVD, WIFI, HDMI, VGA, Bluetooth 4.0, Windows 10 Professional 64 Bit (Renewed) : Electronics
Solved: 390, CPU upgrades? - Dell Community
Branded CPU - Dell Optiplex 9020 SFF Desktop CPU Wholesale Trader from Mumbai
OptiPlex 390 Desktop Parts & Upgrades | Dell USA
Dell Optiplex 390 Teardown - YouTube
Support for OptiPlex 390 | Drivers & Downloads | Dell US