any recommended upgrades? (755 SFF) - Dell Community
Upgrades to My New Dell Optiplex 755 - YouTube
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
Restored Dell OptiPlex 755 Tower Desktop PC with Intel Core 2 Duo E6550 Processor, 4GB Memory, 1TB Hard Drive and Windows 10 Home (Monitor Not Included) (Refurbished) - Walmart.com