Dell Optiplex 755 Tower Computer PC, 2.33 GHz Intel Core 2 Duo, 4GB DDR3 RAM, 500GB SATA Hard Drive, Windows 10 Home 64 Bit (Renewed) | StackSocial
How To: Dell Optiplex 755 Ram Upgrade - YouTube
Refurbished: Dell Optiplex 755 Small Form Factor Desktop (R2/Ready for Reuse) with Intel Celeron 430@1.80GHz, 2GB RAM, 80GB HD and licensed Windows 7 Home Premium from a Microsoft Authorized Refurbisher - Newegg.com
8GB 4X2GB Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory at Amazon.com
Optiplex 755 USFF cpu and ram upgrade - Dell Community
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Restored Dell OptiPlex 755 Tower Desktop PC with Intel Core 2 Quad Q6600 Processor, 4GB Memory, 500GB Hard Drive and Windows 10 Pro (Monitor Not Included) (Refurbished) - Walmart.com
How to upgrade a DELL OptiPlex 755 USFF PC - YouTube