Crucial 16GB DDR4 SDRAM Memory Module - for Notebook - 16 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - CL19-1.20 V - Non-ECC - Unbuffered - 260-pin - SoDIMM (CT16G4SFS8266) at Amazon.com
32GB (2 x 16 GB) DDR4 SDRAM Memory Module at Amazon.com
Kingston 16GB DDR4 SDRAM Memory Module at Amazon.com
Axiom 8GB DDR4 SDRAM Memory Module - 8 GB (1 X 8 GB) - DDR4-2666/PC4-21333 DDR4 SDRAM - 1.20 V - 288-Pin - DIMM 4VN06AA-AX at Amazon.com
G.Skill Trident Z RGB Series 16GB (2 x 8GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-16GTZR at Amazon.com