A list of successful iMac 27" (2012-2019) SSD upgrades | MacRumors Forums
maxupgrades.com: 1TB Samsung 850 EVO mSATA 6G Blade SSD for iMac 21 inch/ iMac 27 inch 2012 Models [Model ID 13,1 & 13,2]
Steps In Replacing the Apple Blade SSD Part in a Fusion Drive? | MacRumors Forums
Upgrading an older iMac's PCIe SSD: Third-party solutions that save you beaucoup bucks | Macworld
SATA Blade SSD Module - Dual SSD Drive Kit for iMac 27 Inch 2012 Model - video Dailymotion
Apple Proprietary SSDs: Ultimate Guide to Specs & Upgrades | BeetsBlog
maxupgrades.com: Single SSD Drives kit for iMac 27 inch 2012 Models with SATA Blade SSD Module / Heatsink/ Power Cable and DATA Cables for [SSD + HDD] with iMac Adhesive LCD Tape
How to Install a PCIe SSD in a 27-inch iMac (Late 2013)