Kingston 4GB 1600MHz SODIMM DDR3 1600 Memory Module for HP (PC3 12800) KTH-X3C/4G at Amazon.com
OWC 16GB DDR3 1600 MHz SO-DIMM Memory Upgrade Kit
Ram Memory 8GB kit (2 x 4GB) DDR3 PC3-12800,1600MHz, 204 PIN SODIMM for laptops at Amazon.com
Silicon Power Hynix IC Compatible for Apple DDR3 DDR3L 16GB (2 x 8GB) RAM 1600MHz (PC3 12800) 204 pin CL11 1.35V Non ECC Unbuffered SODIMM Laptop Notebook Memory RAM Module Upgrade at Amazon.com