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Dell OptiPlex 390 Intel Core i3 3.30G|$ 120.00
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CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 390 Ddr3 Dimm - A69 at Amazon.com
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Solved: 390, maximum memory? - Dell Community
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Optiplex 390 / 3010 memory upgrade tutorial - YouTube
