A-Tech 64GB (4x16GB) RAM for Apple iMac 2017 27 inch Retina 5K | DDR4 2400MHz SODIMM PC4-19200 2Rx8 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
Upgrade your iMac's RAM in less than 5 minutes - YouTube
Buying a New iMac? Here's What You Need to Know About 2017 iMac RAM Upgrades
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Timetec Kit de 32GB (2x16GB) Compatible para Apple 2017 iMac (27 Pulgadas con Retina 5K, 21.5 Pulgadas) DDR4 2400MHz PC4-19200 SODIMM Mac RAM Upgrade para iMac18.1/iMac18.2/iMac18,3 : Amazon.es: Informática
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
Install memory in an iMac - Apple Support
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET