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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
OFFTEK 512MB Replacement Memory RAM Upgrade for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) (DDR2-5300 - Non-ECC) Desktop Memory at Amazon.com
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 at Amazon.com
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How to upgrade a DELL OptiPlex 755 USFF PC - YouTube
Dell Refurbished OptiPlex 755 Desktop Intel Core 2 Duo 2GB Memory 160GB Hard Drive 755 DT-0184 - Best Buy
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For Dell OptiPlex 755 8GB 4x 2GB DDR2 PC6400 PC2-6400 800 Mhz DESKTOP MEMORY RAM | eBay
8GB KIT (4 x 2GB) for Dell Optiplex 740 745 745c 755 DT/MT/SFF 755. DIMM DDR2 Non-ECC PC2-5300 667MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
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8GB 4X2GB Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory at Amazon.com
Refurbished Dell OptiPlex 755 Tower Desktop PC with Intel Core 2 Duo Processor, 4GB Memory, 250GB Hard Drive and Windows 10 Pro (Monitor Not Included) - Walmart.com
Optiplex 755 USFF cpu and ram upgrade - Dell Community
8GB 4x2GB PC2-6400U DDR2 800mhz RAM For Dell OptiPlex 755 760 960 XPS 410 420 AB | eBay
![4GB [2x2GB] DDR2-667 (PC2-5300) RAM Memory Upgrade Kit for The Dell Optiplex 755 Desktop (Genuine A-Tech Brand) at Amazon.com](https://m.media-amazon.com/images/I/71QNSIWvJoL._AC_UF894,1000_QL80_.jpg "4GB [2x2GB] DDR2-667 (PC2-5300) RAM Memory Upgrade Kit for The Dell Optiplex 755 Desktop (Genuine A-Tech Brand) at Amazon.com")