CPU fans spinning a lot after OWC SSD upgrade

Discussion in 'MacBook Air' started by sarimo, Mar 27, 2017.

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  1. sarimo macrumors newbie

    Joined:
    Mar 27, 2017
    #1
    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.
     
  2. ApfelKuchen macrumors 68030

    Joined:
    Aug 28, 2012
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    Between the coasts
    #2
    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.
     
  3. sarimo thread starter macrumors newbie

    Joined:
    Mar 27, 2017
    #3
    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).
     

    Attached Files:

  4. vincebio macrumors 6502a

    vincebio

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    Glasgow
  5. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

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    Aug 5, 2001
    Location:
    Denmark
    #5
    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?
     
  6. sarimo thread starter macrumors newbie

    Joined:
    Mar 27, 2017
    #6
    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.)
     
  7. abrahamw88 macrumors member

    abrahamw88

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    Aug 2, 2012
    Location:
    Rochester, NY
    #7
    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.
     
  8. Johnny365 macrumors 6502

    Johnny365

    Joined:
    Nov 30, 2015
    #8
    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.
     
  9. flowrider macrumors 601

    flowrider

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    Nov 23, 2012

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