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Model A1419 / Late 2013 / 3.2 & 3.4 GHz Core i5 or 3.5 GHz Core i7 Processor, ID iMac14,2

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Fan runs faster than normal

Recently I upgraded my iMac, so I replaced the thermal paste and the hd, and I put a nvme m2 in. Now my fan runs at 2000 rpm, earlier it ran at 1200 rpm. I didn’t put any thermal sensor onto the hd. My iMac is a iMac14,2, so 27” late 2013. Do I really need the sensor as Macs fan control sees the hd’s one?

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If you replaced the original hard drive with a standard spinning disk drive, you need the OWC In-line Digital Thermal Sensor for Hard Drive Upgrade for 27" iMacs 2012 and Later

https://eshop.macsales.com/item/OWC/DIDI...

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2 Comments:

So I would need it even if the fan isn’t raging at full speed?

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I don’t understand why I should buy it since the fan only runs at 2000 rpm, not the max 3600 rpm

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