Optiplex 755 USFF cpu and ram upgrade - Dell Community
2GB Memory RAM Upgrade for Dell Optiplex 755 Mini Tower DDR2-800MHz 240-pin DIMM | eBay
Refurbished: Dell Optiplex 755 A Grade Desktop PC with Intel Core 2 Duo 2.66GHz, 4GB RAM, 1TB HDD, DVDRW, Windows 7 Professional 64 Bit, Microsoft Authorized Recertified Desktop PC w/1 Year Warranty - Newegg.com
any recommended upgrades? (755 SFF) - Dell Community