iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
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
Can you upgrade the RAM in the 27-inch iMac? | iMore
27 inch iMac with Retina 5k Display 2019 3.7GHz i5 2TB SSD 64GB RAM | Refurbished | Techable