8GB Kit (2x4GB) for Apple iMac 27-Inch "Core i5" 3.4 5K Mid-2017 Ram Memory | eBay
How to upgrade RAM in the (Mid 2017) 5K iMac and save up to ~$900 [Video] - 9to5Mac
Recensione: RAM Crucial DDR4 per iMac 5K 2017, la scelta migliore
16GB Kit 2x 8GB Memory RAM for Apple iMac Mid 2017 Retina 4K iMac18,1 iMac18,2 | eBay
Install memory in an iMac - Apple Support
Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else