CRUCIAL BY MICRON - DRAM 32GB DR X4 DDR4 RDIMM 2666 at Amazon.com
Crucial RAM 16GB DDR4 3200MHz CL22 (or 2933MHz or 2666MHz) Laptop Memory CT16G4SFRA32A at Amazon.com
Amazon.com: Crucial RAM 32GB DDR4 2666 MHz CL19 Memory for Mac CT32G4S266M : Everything Else
G.Skill Trident Z RGB Series 32GB (2 x 16GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-32GTZR at Amazon.com
Synology RAM DDR4-2666 Non-ECC SO-DIMM 4GB (D4NESO-2666-4G) at Amazon.com