Kingston Value RAM 4GB 1333MHz PC3-10600 DDR3 Non-ECC CL9 SODIMM SR X8 Notebook Memory (KVR13S9S8/4) at Amazon.com
Kingston Value (KVR16N11S8/4) RAM 4GB 1600MHz PC3-12800 DDR3 Non-ECC CL11 DIMM SR x8 Desktop Memory at Amazon.com
OWC 8 GB (2 X 4GB) ram PC8500 DDR3 1066MHz sodimm 204-pin Memory Upgrade Kit, (OWC8566DDR3S8GP), Compatible with MacBook Pro, MacBook, Mac Mini and iMac at Amazon.com
SK Hynix 4GB DDR4 1Rx8 PC4-2133P-UA1-10 HMA451U6AFR8N-TF Desktop RAM Memory at Amazon.com
Synology RAM DDR3L-1866 SO-DIMM 4GB (D3NS1866L-4G) at Amazon.com
4GB (1x4GB) DDR4-2400MHz PC4-19200 1.2V SODIMM Memory for Laptop by NEMIX RAM at Amazon.com