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CMS 8GB (2X4GB) DDR3 10600 1333MHZ NON ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 390 Ddr3 Dimm - A69 - Newegg.com
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CMS 4GB (1X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 390 Ddr3 Dimm - A70 at Amazon.com
8GB (2 X 4GB) Memory Upgrade for Dell Optiplex 390 DDR3 PC3-10600 1333MHz Desktop DIMM RAM (PARTS-QUICK Brand) at Amazon.com
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Dell OptiPlex 390 DT vs. Dell OptiPlex 990 DT Comparison
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OFFTEK 4GB Replacement Memory RAM Upgrade for Dell OptiPlex 390 (Desktop) (DDR3-10600 - Non-ECC) Desktop Memory at Amazon.com
