Patriot Signature Series 8GB DDR4-3200 PC4-25600 CL-22 SO-DIMM Memory PSD48G320081S - Micro Center
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
Kingston 16GB DDR4-2666 PC4-21300 CL19 Single Channel ECC Server Memory Module KSM26ED8/16HD - Green - Micro Center