Amazon.com: V-Color 16GB(2x8GB) DDR3/DDR3L 1866MHz RAM for iMac Late 2015 27" Retina 5K Display, MacBook Pro Non ECC iMac SO-DIMM hynix Original IC2Rx8 CL13 1.35V (TN38G18D813LK-RD) : Everything Else
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
64GB RAM Kit für Apple iMac 27'' , DDR4 2400MHz, PC4-19200: Amazon.de: Computer & Zubehör
Amazon.com: 2017 Apple iMac with Intel Core i5 (21.5-inch, 8GB RAM, 1TB Storage) - Silver (Renewed) : Electronics
2017 27-inch Apple iMac with Retina 5K Display Unboxing and Teardown (iMac18,3) - YouTube
OWC 32GB (2 x 16GB) PC21300 DDR4 2666MHz 260pin SO-DIMMs Memory Ram Module, Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs, (OWC2666DDR4S32P) at Amazon.com
Arbeitsspeicher im iMac installieren - Apple Support (DE)