Apple iMac 5K 27-inch (Mid 2019) 3.6GHz i9 16GB RAM 512GB SSD - Buy Refurbished iMac 2019 at Techable
32GB NEMIX RAM Memory for 2019 Apple iMac 27 inch Retina 5K (iMac19,1 A2115), 2018 Apple Mac Mini (Macmini8,1 A1993) System Specific Memory - Newegg.com
2019 5K iMac RAM Upgrade Guide - YouTube
New For Imac 27" Retina 5k 2019 Year A2115 4gb 8gb 16gb 32gb 64gb 128gb Ram Pc4-2666v 2667mhz Ddr4 Memory Upgrade Kit Emc 3194 - Laptop Repair Components - AliExpress
Apple iMac 27 Inch 5K 2019 3.6 GHz i9 2TB SSD 32GB 2667MHz RAM Vega 48 – Quality Macs
Amazon.com: Apple iMac MRQY2LL/A 27 Inch Early 2019 i5 3.0GHz 8GB Ram - 1TB HHD (Renewed) : Electronics
Memory Upgrades for 2019-2020 iMac 27-Inch - Up to 128GB
The 27-inch iMac 2019's RAM may be upgraded to 128GB - NotebookCheck.net News