SK Hynix 4GB DDR4 1Rx8 PC4-2133P-UA1-10 HMA451U6AFR8N-TF Desktop RAM Memory at Amazon.com
G.Skill Trident Z NEO Series 16GB (2 x 8GB) 288-Pin SDRAM (PC4-28800) DDR4-3600 CL18-22-22-42 1.35V Dual Channel Desktop Memory Model F4-3600C18D-16GTZN 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
Crucial RAM 16GB DDR4 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory CT16G4SFRA32A at Amazon.com