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Refurbished: Dell OptiPlex 755 MT with Intel Core 2 Duo E6550 2.33GHz, 4GB RAM, 250GB HDD, DVD-ROM, Windows 7 Home Premium 32-Bit - Newegg.com
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CMS 1GB (1X1GB) DDR2 6400 800MHZ NON ECC DIMM Memory Ram Compatible with Dell Optiplex 755 Dt / Mt / Sff - A105 - Walmart.com
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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
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