A-Tech 8GB Memory RAM for Dell OptiPlex 3040 SFF - DDR3L 1600MHz PC3-12800 Non ECC DIMM 2Rx8 1.35V - Single Desktop Upgrade Module (Replacement for A8733212) at Amazon.com
Dell OptiPlex 3040 Desktop | 3.2GHz Intel i5 Quad Core Gen 6 | 16GB RAM | 2TB SATA HDD | Windows 10 Pro 64 bit | 22" Widescreen Monitor (Refurbished) | Jerusalem Post
Amazon.com: Microsoft Authorized Refurbisher- Dell Optiplex 3040 Micro Form Factor PC Intel i3-6100T 3.2GHz. 8GB DDR3 RAM,256 SSD, WiFi, with Dual Dell 24 P2419HLCD Windows 10 Pro (Renewed) : Electronics