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Restored Dell Optiplex 745 Small Form Factor Desktop PC with Intel Core 2 Duo Processor, 4GB Memory, 80GB Hard Drive and Windows 10 Home (Monitor Not Included) (Refurbished) - Walmart.com
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Memory: Dell OptiPlex 745 User's Guide
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A-Tech 8GB (4X 2GB) Max Memory RAM Kit for Dell OptiPlex 755, 745, 740, (MT, DT, SFF) - DDR2 667MHz PC2-5300 Non-ECC DIMM Upgrade at Amazon.com
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CMS 8GB (4X2GB) DDR2 6400 800MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 745, 745C Series Desktop - A92 at Amazon.com