CPU fans spinning a lot after OWC SSD upgrade

sarimo

macrumors newbie
Original poster
Mar 27, 2017
3
0
Hi, I recently purchased and installed a 240GB OWC Mercury Aura 6G 2012 for MacBook Air 5,2.

After installing the drive, I restored from Time Machine.

But my CPU fans have been spinning like crazy. Is this normal? I reset the SMC and NVRAM to no avail. Is the SSD defective, and should I send it back?

Thank you for your help.
 

ApfelKuchen

macrumors 68040
Aug 28, 2012
3,663
2,266
Between the coasts
Not necessarily the SSD. Could be a temperature sensor. Could be other things. Could be a coincidence and you have a runaway CPU process.

So, run Apple Hardware Test https://support.apple.com/HT201257
Open Activity Monitor and see if there's anything pulling high CPU % (over 100% is a dead giveaway).

Knowledge is better than guesswork.
 

sarimo

macrumors newbie
Original poster
Mar 27, 2017
3
0
Not necessarily the SSD. Could be a temperature sensor. Could be other things. Could be a coincidence and you have a runaway CPU process.

So, run Apple Hardware Test https://support.apple.com/HT201257
Open Activity Monitor and see if there's anything pulling high CPU % (over 100% is a dead giveaway).

Knowledge is better than guesswork.
Hi, thank you for your reply.

So in order, I did the following:
- Reset SMC and NVRAM
- Did a clean install of Sierra and installed each app one-by-one
- Activity monitor was clear (attached)
- Ran Apple Hardware test and it said: no problem found
- I installed Macs Fan Control, and the fans are spinning at max (attached).
 

Attachments

T'hain Esh Kelch

macrumors 603
Aug 5, 2001
5,167
4,716
Denmark
Spotlight Indexing your new drive no?
No, mdworker has spent almost no time active, as visible in his first screenshot.

Your CPU is really hot, that's why the fans are active. And the CPU wouldn't be hot unless you A. have had the CPU active for quite some time, which is inconsistent with your first screenshot, or B. you accidently broke a CPU sensor or unplugged its cable.
Does the CPU temperature remain high over a periode, with no CPU activity?
 

sarimo

macrumors newbie
Original poster
Mar 27, 2017
3
0
Thanks for your replies.

Over an hour or so period of monitoring with Hardware Monitor, the CPU proximity temperatures fall between 40-60 degrees celsius, with some spikes. I guess they are generally not too high?

upload_2017-3-29_16-32-45.png


(and this with minimal CPU activity, a couple of Chrome tabs, a PDF, a file download etc.)
 

abrahamw88

macrumors member
Aug 2, 2012
82
27
Rochester, NY
So looks like it would be option B, possibly a broken sensor or wire connection. Those temperatures do not seem to be high enough to call for maximum fan speed.
 

Johnny365

macrumors 6502a
Nov 30, 2015
746
332
The real test to determine that it is the SSD or something else in the system, is to reinstall the factory Apple SSD and check the temperature/fan noise.
 
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