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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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DELL Optiplex OP390 Tower Computer PC, Intel Dual-Core i3, 250GB HDD, 4GB DDR3 RAM, Windows 10 Home, DVD, WIFI (Used - Like New) - Walmart.com
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Used Dell Optiplex 755 Tower Intel Core 2 Duo 3.0Ghz Processor, 4GB RAM, 1TB Hard Drive, DVD-Rom, Windows 10 Home 64 Bit - Walmart.com
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Refurbished: Dell OptiPlex 755 SFF Desktop - Intel Core 2 Duo 2.2Ghz, 4GB, 750GB, DVD-Combo, Win 7 Professional 64-Bit - Newegg.com
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A-Tech 4GB (2X 2GB) Memory RAM Kit for Dell OptiPlex 755, 745, 740, GX620, GX520, 360, 330, 160, FX160, (MT, DT, SFF, USFF) - DDR2 667MHz PC2-5300 Non-ECC DIMM Modules
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CMS 4GB (2X2GB) DDR2 6400 800MHZ NON ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 755 Dt / Mt / Sff - A90 - Walmart.com
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