Samsung 4GB DDR3 Memory SO-DIMM 204pin PC3-12800S 1600MHz at Amazon.com
G.Skill Ripjaws Series 8GB 204-Pin DDR3 SO-DIMM DDR3 1600 (PC3 12800) Laptop Memory (F3-1600C9S-8GRSL) at Amazon.com
Kingston 4GB 1600MHz SODIMM DDR3 1600 Memory Module for HP (PC3 12800) KTH-X3C/4G at Amazon.com
Dell 8GB DDR3L-1600 PC3L-12800 204Pin Sodimm Low Voltage RAM Memory Upgrade P/N SNPN2M64C/8G 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
Samsung ram Memory 16GB kit (2 x 8GB) DDR3 PC3L-12800,1600MHz, 204 PIN SODIMM for laptops at Amazon.com
OWC 8GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Module Upgrade Compatible with iMac, Mac Mini, and MacBook Pro (OWC1600DDR3S8GB) at Amazon .com
Vengeance Performance Memory Kit at Amazon.com
Ram Memory 8GB kit (2 x 4GB) DDR3 PC3-12800,1600MHz, 204 PIN SODIMM for laptops at Amazon.com