Synology RAM DDR4 ECC SO-DIMM 8GB (D4ES01-8G) at Amazon.com
Corsair Memory Kit 16GB (2x8GB) DDR4 2400MHz SODIMM Memory, (2 x 8GB) at Amazon.com
Amazon.com: Kuesuny: LAPTOP RAM SODIMM
Amazon.com: Crucial 8GB Single DDR4 2400 MT/S (PC4-19200) SR x8 SODIMM 260-Pin Memory - CT8G4SFS824A : Everything Else
Silicon Power Hynix IC Compatible for Apple DDR3 DDR3L 16GB (2 x 8GB) RAM 1600MHz (PC3 12800) 204 pin CL11 1.35V Non ECC Unbuffered SODIMM Laptop Notebook Memory RAM Module Upgrade at Amazon.com