iMac (Retina 5K, 27-inch, Late 2015) - Technical Specifications
iMac SSD - 4mac
Memory Upgrades for iMac w/ Retina 5K Display Late 2015
Original 512GB SSD MZ-JPU512T/0A6 For Apple iMac 21.5-inch A1418 Retina(Late 2013 – Late 2015), iMac 27-inch A1419 Retina(Late 2013 – Late 2015), Mac mini (Late 2014), Mac Pro (Late 2013), MacBook Air
How to Add An SSD To The 27" iMac (Late 2015) - iFixit Repair Guide
Part #2 - iMac 27" 5K | SSD Installation - Hardware Late 2015 Mk472 - YouTube
How to Install a PCIe SSD in a 27-inch iMac with 5K Display
Upgrading a 27-inch iMac 5K to 14 terabytes - Replacing the Fusion Drive with both a SSD and an harddisk
Apple 27 Inch Imac Retina 5K Replacing HDD for SSD Installation Video - YouTube