Assumptions, assumptions. Guess alias Last replace hard drive on imac 2011 Recur deadline digest
OWC - In-line Digital Thermal Sensor Cable for upgrading the Hard Drive in 27-inch & 21.5-inch iMac (2011) models : Amazon.co.uk: Computers & Accessories
How To Upgrade/Replace Mid-2011 iMac 21.5" Hard Drive To an SSD! - YouTube
How to: Install an Intel iMac Dual Hard Drive Kit 21.5" (Mid 2011) - YouTube
iMac Hard Drive Upgrade to SSD - Your local Apple Repair Specialists
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