8GB (4GBx2) Team High Performance Memory RAM Upgrade For Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor). The Memory Kit comes with Life Time Warranty. at Amazon.com
8GB 4x 2GB DDR2 PC6400 PC2-6400 800 Mhz DESKTOP MEMORY RAM for Dell OptiPlex 755 | eBay
Memory RAM Upgrade for Dell Optiplex 760 Desktop 2GB DDR2 DIMM | eBay
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Dell OptiPlex 755 Repair - iFixit
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![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")
4GB [2x2GB] DDR2-667 (PC2-5300) RAM Memory Upgrade Kit for The Dell Optiplex 755 Desktop (Genuine A-Tech Brand) at Amazon.com
