Dell Latitude E6420 RAM Replacement - iFixit Repair Guide
Dell Latitude E6420 Business Class Laptop Intel i7 2620M 2.70GHz Processor 8GB RAM Memory 500GB Hard Drive DVDRW Windows 7 Professional 64-bit Integrated Web Camera - Walmart.com
How To Replace Memory On a Latitude E6420 | Dell US
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
Dell Latitude E6420 Business Class Laptop Intel i7 2620M 2.70GHz Processor 8GB RAM Memory 500GB Hard Drive DVDRW Windows 7 Professional 64-bit Integrated Web Camera - Walmart.com