A-Tech 2GB Memory RAM for Dell Latitude E6420 - DDR3L 1600MHz PC3-12800 Non ECC SO-DIMM 1Rx16 1.35V - Single Laptop & Notebook Upgrade Module ( Replacement for SNPTX3GVC/2G) at Amazon.com
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
Amazon.com: Crucial 4GB Upgrade for a Dell Latitude E6420 System (DDR3 PC3-12800, Non-ECC,) : Electronics
Dell Latitude E6420 Laptop Computer, 2.50 GHz Intel i5 Dual Core Gen 2, 8GB DDR3 RAM, 128GB SSD Hard Drive, Windows 10 (Reused) - Walmart.com
A-Tech 2GB Memory RAM for Dell Latitude E6420 - DDR3L 1600MHz PC3-12800 Non ECC SO-DIMM 1Rx16 1.35V - Single Laptop & Notebook Upgrade Module ( Replacement for SNPTX3GVC/2G) at Amazon.com