How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
OWC can double or quadruple the RAM in 27-inch iMac 5K | Cult of Mac
Install memory in an iMac - Apple Support
Amazon.com: A-Tech Kit de 128 GB (4 x 32 GB) RAM para Apple iMac 2019 y 2020 Retina 5K de 27 pulgadas | DDR4 2666 MHz SODIMM PC4-21300 / PC4-21333 260 pines SO-DIMM Max Actualización de memoria : Electrónica
Apple iMac 5K 27-inch (Mid 2019) 3.6GHz i9 16GB RAM 512GB SSD - Buy Refurbished iMac 2019 at Techable