Crucial RAM 16GB DDR4 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory CT16G4SFRA32A at Amazon.com
TEAMGROUP Elite DDR4 8GB Single 2666MHz PC4-21300 CL19 Unbuffered Non-ECC 1.2V SODIMM 260-Pin Laptop Notebook PC Computer Memory Module Ram Upgrade - TED48G2666C19-S01 at Amazon.com
G.Skill Trident Z Royal Series [Silver] 16GB (2 x 8GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-16GTRS at Amazon.com