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Dell Motherboard for OptiPlex 390 | Laptech The IT Store.
Dell OptiPlex 390 Desktop Computer Core i5 3.1GHz Processor 8GB RAM 1TB Hard Drive DVD Wi-Fi with 19" LCD and T-Wolf TF100 Wireless Keyboard and Mouse- Windows 10 Renewed PC - Walmart.com
Solved: 390, maximum memory? - Dell Community
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Dell Optiplex 390 Upgrade RAM, SSD, DVD Drive - YouTube
Dell OptiPlex 390 Desktop Computer Core i5 3.1GHz Processor 8GB RAM 1TB Hard Drive DVD Wi-Fi with 19" LCD and T-Wolf TF100 Wireless Keyboard and Mouse- Windows 10 Renewed PC - Walmart.com