16 GB in a Dell Latitude E6420 - The Silicon Underground
A-Tech 16GB Kit (2x8GB) RAM for Dell Latitude E6520, E6510, E6420, E6320, E6220, E5520, E5420 Laptop | DDR3 1333 MHz SODIMM PC3-10600 Memory Upgrade at Amazon.com
PCIe upgrade for Dell E6420? - Page 2 - Dell Community
Dell Latitude E6420 Laptop Computer, 2.50 GHz Intel i5 Dual Core Gen 2, 16GB DDR3 RAM, 500GB Hard Disk Drive (HDD) SATA Hard Drive, Windows 10 Home 64Bit, 14" Widescreen Screen (Used) - Walmart.com