64GB RAM upgrade kit for 21.5-inch iMAC now offered by OWC - 9to5Mac
Apple iMac (27-inch, 2017) review: Apple doesn't mess with success - CNET
Apple 21.5" Certified Refurbished iMac with Retina 4K Display Intel Core i5 3.0GHz 8GB Memory 256GB SSD (2019) Silver MHK33LL/A - Best Buy
OWC Confirms New Low-End 27-inch iMac Can Be Fitted With 64GB RAM - MacRumors
Apple A Grade Desktop Computer iMac 21.5-inch (Retina 4K) 3.4GHZ Quad Core i5 (Mid 2017) MNE02LL/A 8 GB 1 TB HDD 4096 x 2304 Display Mac OS Includes Keyboard and Mouse - Walmart.com
Review: Apple's 21.5" iMac with Retina 4K display gets solid 2017 architectural refresh | AppleInsider
A-Tech 32GB (2x16GB) RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 2Rx8 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement - iFixit Repair Guide
iMac Intel 21.5" Retina 4K Display (2017) RAM Replacement - iFixit Repair Guide
iMac 21.5-inch 4K (2017) Review | Trusted Reviews
A-Tech 32GB (2x16GB) RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 2Rx8 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
iMac 21.5" 2.7Ghz i5 RAM & SSD UPGRADE 2017 - YouTube
Teardown of New 4K 21.5-inch iMac Reveals Removable RAM and Modular CPU - MacRumors
A-Tech 16GB (2x8GB) RAM for Apple iMac 2017 (27 inch Retina 5K & 21.5 inch Retina 4K) | DDR4 2400MHz SODIMM PC4-19200 1.2V 260-Pin SO-DIMM Memory Upgrade Kit at Amazon.com
iMac Retina 4K 2019 21.5-inch 1TB Fusion 3.2GHz Six-core i7 MRT32LL/A (BTO)
Memory Upgrades for iMac 21.5-Inch 2017
How to Upgrade/Install Memory in a 21.5-inch iMac (Mid 2017) iMac18,1 iMac18,2 - YouTube
Apple 21.5in iMac with Retina 4K display (2017) review | Stuff
iMac 21.5-inch (2017) Review: Ultimate Refinement | Macworld
Install memory in an iMac - Apple Support
iMac 21.5-inch 4K (2017) Review | Trusted Reviews
Timetec 16GB Compatible for Apple 2017 iMac (27-inch w/Retina 5K, 21.5-inch w/Retina
Configure your own 21.5-inch Apple iMac (2017) at OWC
iMac (Retina 4K, 21.5-inch, 2017) - Technical Specifications
Install memory in an iMac - Apple Support
