OWC 64GB (2 x 32GB) PC21300 DDR4 2666MHz SO-DIMMs Memory Compatible with Mac Mini 2018, iMac 2019 and up, Dell, HP, Lenovo, ASUS and Compatible PCs (OWC2666DDR4S64P) at Amazon.com
Apple - DDR4 - 128 GB: 2 x 64 GB - LRDIMM 288-pin - LRDIMM | Billig
128GB (4x32GB) vs. 64GB (2x32GB) DDR4 RAM on AMD Ryzen Performance Benchmarks Report | APH Networks
G.SKILL Trident Z Neo Series 64GB DDR4 3600 RAM Memory - Newegg.com