HDD to SSD, HDD fan was running full speed, so I installed

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HDD to SSD, HDD fan was running full speed, so I installed

After getting my old (iMac mid2011) hard drive replaced with a new SSD, the HDD fan was running like crazy. So I installed Macs Fan Control. It shows the ODD running nicely at 997, in a range shown to be 1000-2500. The CPU fan is running nicely at 939, with a suggested range of 940-2100. The HDD fan was running at 5501-5510 with a range suggested at 1100-5500. (goin' like he!!! So after changing to an SSD, I didn't even think the HDD fan should even be running, but I set the speed to 4500 and it quieted down. How low can I run the HDD fn, and would resetting the PRAM slow/stop the HDD fan?

Thanks,

FRED

iMac 27", macOS 10.13

Posted on Apr 28, 2020 2:13 PM

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Answer 1

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BDAqua

Level 10

239,699 points

Apr 28, 2020 3:35 PM in response to deltone

You do need to run the HDD fan, the cooler the SSD runs the longer it'll last, so you get to decide the speed that best meets your longevity requirements versus your noise requirements.

OWC sells a thermal sensor for 2011 iMac Disk replacements....

https://eshop.macsales.com/item/OWC/DIDIMACHDD11/

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Answer 2

deltone Author

Level 1

14 points

Apr 28, 2020 7:08 PM in response to BDAqua

I set the HDD fan speed at 3500 at about 2:30 PST, and the temp has remained at a steady 28-29c all day (4.5 hours). So the noise is much improved, the temp seems great, so I think I have found the right setting. Thanks for the reply.

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