Restored Dell Optiplex 755 Desktop PC with Intel Core 2 Quad Processor, 4GB Memory, 1TB Hard Drive and Windows 10 Pro (Monitor Not Included) (Refurbished) - Walmart.com
Need help for OPTIPLEX 755, Upgrade RAM 1GB - Dell Community
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