SSD Upgrade Kits for 27-Inch iMac (2012 - Early 2013)
iMac late 2012 SSD Upgrade - Apple Community
How to Upgrade iMac Hard Drive (2009, 2010, 2011): EveryMac.com
How to Add An SSD To The 27" iMac (Late 2015) - iFixit Repair Guide
OWC SSD Upgrade Kits for 27-Inch iMac 2011
maxupgrades.com: Dual SSD Drives kit for iMac 27 inch 2012 Models with Blade SSD Module with Heatsink and Power and DATA Cables
2011 imac 27" 32GB - final stage of 1TB + 2TB SSD upgrade (replaced HDD & optic drive). Also cleaned out the fans and case. Running 'SSD Fan Control' & 'Macs Fan