2011 iMac SSD Upgrade with Thermal Sensor w/ resetting NVRAM Tutorial no steps skipped - YouTube
OWC In-line Digital Thermal Sensor Cable for iMac 2009-2010 HDD/SSD Upgrade (no tools, SSD requires – RamCity.com.au
hard drive - What's the difference between OWC's HDD/SSD thermal sensor(s) vs shorting the pins/using an ODD thermal sensor/replacing with a bipolar transistor? - Ask Different
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Amazon.com: OWC in-Line Digital Thermal Sensor HDD Upgrade Cable for iMac 2009-2010, (OWCDIDIMACHDD09) : Electronics
iMac Intel 21.5" and 27" (Mid 2011) SSD Temperature Sensor