OWC 32GB (2 x 16GB) PC21300 DDR4 2666MHz SO-DIMMs Memory, Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs, (OWC2666DDR4S32P) at Amazon.com
Sam Original 32GB (2x16GB) DDR4 3200MHz PC4-25600 (or 2933MHz or 2666MHz) SODIMM 2Rx8 CL22 1.2v Notebook Laptop Gaming Memory Module Upgrade RAM M471A2K43EB1-CWE Adamanta at Amazon.com
Crucial RAM 16GB Kit (2x8GB) DDR4 3200MHz CL22 (or 2933MHz or 2666MHz) Desktop Memory CT2K8G4DFRA32A at Amazon.com
32GB Kit (4 x 8GB) DDR4-2933 PC4-23400 Non-ECC Unbuffered Desktop Memory by NEMIX RAM at Amazon.com
8GB DDR4-2933 PC4-23400 Non-ECC Unbuffered Desktop Memory by NEMIX RAM at Amazon.com
Corsair Vengeance Performance SODIMM Memory 16GB (2x8GB) DDR4 2933MHz CL19 Unbuffered for 8th Generation or Newer Intel Core™ i7, and AMD Ryzen 4000 Series notebooks at Amazon.com