The New 2017 iMac: Notes & Tidbits on RAM - The Mac Observer
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
iMac Retina 5K: Memory upgrade (RAM)
Install memory in an iMac - Apple Support
How to upgrade RAM in the (Mid 2017) 5K iMac and save up to ~$900 [Video] - 9to5Mac
Install memory in an iMac - Apple Support
Apple A Grade Desktop Computer iMac 21.5-inch 2.3GHZ Dual Core i5 (Mid 2017) MMQA2LL/A 8 GB RAM 1 TB HDD 1920x1080 Display Mac OS Includes Keyboard and Mouse - Walmart.com
Install memory in an iMac - Apple Support
Apple iMac 21.5" Desktop with 4K Retina Display, 3.0GHz, MNDY2LL/A - (June, 2017) for sale online | eBay
How to upgrade RAM in the (Mid 2017) 5K iMac and save up to ~$900 [Video] - 9to5Mac
Memory Upgrades for 2017 iMac 27-Inch
OWC Confirms New Low-End 27-inch iMac Can Be Fitted With 64GB RAM - MacRumors