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
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac
OWC SSD Upgrade Kits for 27-Inch iMac 2009
iMac 2012 internal storage upgrade
iMac 17,1 replace pcie ssd - Apple Community
How To Upgrade/Replace Mid-2011 iMac 21.5" Hard Drive To an SSD! - YouTube
How-To: Now's the right time to swap your old iMac's hard drive for a fast new SSD - 9to5Mac
iMac Intel 20" EMC 2133 and 2210 Hard Drive Replacement - iFixit Repair Guide
Amazon.com: OWC Data Doubler Optical Bay Hard Drive/SSD Mounting Solution for iMac 2009-2011. : Electronics