i managed to change the internal small 32Gb pci-e ssd with a 128Gb Apple pci ssd and swapped the original Apple HDD
with an aftermarket 2Tbyte HDD. I didn't placed an OWC Thermal sensor on the sata cable, even though OWC says it is needed.
I am hearing perfectly the fans NOT blowing at full...
I have an iMac 27” 5K Late 2014 4.0Ghz i7 with an installed Apple blade drive.
I removed it and installed a Crucial BX500 960Gb SSD.
BUT, i didn’t install the OWC thermal sensor adaptor for this.
For my surprise the fan seems to work fine, no over-speeding.
Is this normal...