Memory Ram 4 Hp Pegatron Motherboards Desktop AP480C-S AP480-S 2x Lot | eBay
8GB 4X2GB RAM for Dell OptiPlex 755 Series Desktop/PC DDR2 PC2-5300 RAM Memory | eBay
OptiPlex 755 Desktop Chassis (DT) Removal Guide for the Memory, Heatsink, System Fan and Power Supply | Dell US
Dell Optiplex 755, Intel Core 2 Quad Q6600, 4GB RAM, 250GB SATA HDD, W – LinkAlone Networks
Refurbished Dell 755 Tower Desktop PC with Intel Core 2 Duo Processor, 4GB Memory, 1TB Hard Drive and Windows 10 Home (Monitor Not Included) - Walmart.com
Refurbished Dell OptiPlex 755 Tower Desktop Computer with Intel Core 2 Duo Processor, 4GB Memory, 160GB Hard Drive DVD Wi-Fi and Windows 10 PC - Walmart.com
Dell Optiplex 755 SFF Intel Core 2 DUO 3.16GHz 2GB RAM 160GB HDD Desktop PC | RecycledGoods.com