8GB DDR4 2666MHz PC4-21300 288 pin DESKTOP Memory Non ECC 2666 Low Density RAM | eBay
Performance DDR4 2666MHz Notebook Memory
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