DELL Optiplex 755 Ultra Small(Core2Duo 2.33G/4G RAM/160G HDD/ WinVista – IGO Cyber House
8GB 4x2GB PC2-6400U DDR2 800mhz RAM For Dell OptiPlex 755 760 960 XPS 410 420 AB | eBay
Need help for OPTIPLEX 755, Upgrade RAM 1GB - Dell Community
2GB PC800 Dell Optiplex 755 RAM Upgrade
i found this dell optiplex 755 in a scrap yard perfectly functioning{came with side panel just have it off} its ungodly slow with only a single stick of ddr2 2gb ram and
Dell OptiPlex 755 MT Intel Core 2 Duo E8300 2.83GHz CPU 2GB RAM No HDD No OS | eBay
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