DDR4 RAM】 Gigastone Laptop RAM 8GB DDR4 8GB DDR4-3200MHz PC4-25600 CL22 1.2V 260 Pin Unbuffered Non ECC SODIMM for Notebook Laptop Memory Module (Laptop ONLY) at Amazon.com
Amazon.com: OWC 8GB (2 x 4GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S08P) : Everything Else