A-Tech 8GB Module for HP EliteBook 840 G3 Laptop & Notebook Compatible DDR4 2666Mhz Memory Ram (ATMS266634A25978X1) at Amazon.com
HP EliteBook 840 G3 MAX RAM? - ToxicNerd
HP EliteBook 840 G3 MAX RAM? - ToxicNerd
Refurbished: HP Elitebook 840 G3 14" Full HD 1920x1080 Laptop PC, Intel Core i5-6300U 2.4GHz, 8GB DDR4 RAM, 256GB SSD, Windows 10 Pro x64 Grade B - Newegg.com
HP EliteBook 840 G3 Core i5 6tH Gen (6300U) 8GB RAM 256GB SSD 14″ Display - Libro Business Systems
HP Ultrabook 840 G3 i5-6300u 12GB RAM 14.5" Backlit 2 drives (256GB SS – Ahmad Computers Inc.
Hp Elitebook 840 G3 Intel Core i5 6th Gen 8GB RAM 256GB SSD 14 Inches FHD Display - Mombasa Computers
parts-quick 8GB Memory for HP EliteBook 840 G3 DDR4 2133MHz SODIMM RAM at Amazon.com