OFFTEK 2GB Replacement Memory RAM Upgrade for Dell OptiPlex 755 Series (Desktop Mini-Tower and Small Form Factor) (DDR2-6400 - Non-ECC) Desktop Memory at Amazon.com
Dell Optiplex 755 Specifications - Desktop PCs - Business PCs - PC World Australia
Upgrading old Dell Optiplex 755 for light gaming - New Builds and Planning - Linus Tech Tips
Solved: OptiPlex 755 upgrade - Dell Community
8GB 4X2GB Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory at Amazon.com
2 GB Dell New Certified Memory RAM Upgrade for Dell OptiPlex 755 & 760 Systems SNPYG410C/2G A2149880 at Amazon.com
Dell Optiplex 755 Motherboard | Laptech The IT Store.
Dell OptiPlex 755 Tower Core 2 Duo 3 GHz - HDD 1 TB RAM 4GB | Back Market