OWC Install Videos
iMac 27-inch with Retina 5K (Late 2014 - Mid 2015)
How to Upgrade or Install a PCIe SSD in a 27-inch Apple iMac with Retina 5K Display (Late 2014 - Mid 2015)
Pro-grade performance: up to 252MB/s real-world speed.
For Apple iMac, Mac mini, and MacBook Pro (non-Retina) 2012 Models
90W Power +