8GB kit, (2 x 4GB) 240-pin DIMM, DDR3 PC3-10600U,Dual Rank, Non ECC ram Memory Module by Hynix (HMT351U6CFR8C-H9) at Amazon.com
Kingston Value (KVR16N11/8) RAM 8 GB 1600MHz DDR3 (PC3-12800) Non-ECC CL11 240 Pin DIMM Motherboard Memory 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