A-Tech 4GB RAM for ASUS K53 Series K53E-BBR19 | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Module at Amazon.com
16GB 2X8GB RAM Memory for Asus K Series k53e Black Diamond Memory Module DDR3 SO-DIMM 204pin PC3-8500 1066MHz Upgrade System Specific Memory - Newegg.ca