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
Kingston HyperX Plug n Play 8 GB Kit (2x4GB Modules) 1600MHz DDR3 SODIMM Notebook/Netbook Memory 8 Dual Channel Kit (PC3 12800) 204-Pin KHX1600C9S3P1K2/8G at Amazon.com