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
iMac 27" 2013 SSD upgrade - IT-Tech Online
iMac 17,1 replace pcie ssd - Apple Community
Amazon.com: Odyson - 1TB SSD Upgrade Kit Replacement for iMac 27" A1419 ( Late 2015) : Electronics
iMac 27 2012-2015 Hard Drive Replacement with SSD
SSD Upgrade Kits for 27-Inch iMac (2012 - Early 2013)