OWC 64GB (4 x 16GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Module Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs (OWC2666DDR4S64S) at Amazon.com
G.Skill TridentZ RGB Series - DDR4-64 GB: 4 x 16 GB - DIMM 288-PIN - ungepuffert at Amazon.com
V-Color 32GB (2 x 16GB) ECC SO-DIMM DDR4 2666MHz (PC4-21300) for NAS Micro Server/Workstation/Compatible with Synology 21 Series 2Rx8 CL19 1.2V (TES416G26D819K-VKC) at Amazon.com
128GB (4 x 32GB) DDR4 3200MHz PC4-25600 288-PIN DIMM MEMORY KIT FOR DESKTOPS/PCs | eBay
CT4K16G4VFS4266 - Crucial 64GB Kit (4 X 16GB) DDR4-2666MHz PC4-21300 E — Tech Network Supply LLC
HyperX Predator 64GB (4 x 16GB) DDR4 3000 RAM (Desktop Memory) CL15 XMP Black DIMM (288-Pin) HX430C15PB3K4/64 - Newegg.com
64GB (4 x 16GB) DDR4 2666MHz PC4-21300 ECC REGISTERED IMAC PRO MEMORY RAM KIT | eBay
4 X Samsung 32GB DDR4 2133 MHz ECC Server RAM PC4-2133P 4DRx4 DIMM 288Pin | eBay