CPU fans go crazy after SSD upgrade

Discussion in 'iMac' started by Santabean2000, Jun 17, 2016.

  1. Santabean2000 macrumors 68000

    Santabean2000

    Joined:
    Nov 20, 2007
    #1
    Hi team, just swapped out the old spinner from a late 2009 imac with a SSD, but now the CPU fans blast full noise.

    Note, this is NOT the HDD temp issue. I used an OWC sata temp adapter and iStat Pro is telling me it is the CPU.

    Pretty sure I connected the temp next to the display port cable and there is a reading of CPU temp and fan speed.

    Tried SMC reset and PRAM. Gann control software doesn't show it down. About to try OS install.

    Any suggestions or tips from experience anyone?

    Any/all help appreciated.
     
  2. keysofanxiety macrumors 604

    keysofanxiety

    Joined:
    Nov 23, 2011
    #2
    Pretty common issue. Can you try this software (on a trial) to see if it makes a positive difference: http://www.hddfancontrol.com/

    EDIT: This one's free, but not sure if it automatically controls fans like the one above, or if you have to manually set the RPM. http://exirion.net/ssdfanctrl/
     
  3. Santabean2000, Jun 17, 2016
    Last edited: Jun 17, 2016

    Santabean2000 thread starter macrumors 68000

    Santabean2000

    Joined:
    Nov 20, 2007
    #3
    Tried these, but made no difference. Thanks for replying though.

    It is the CPU fan not the HDD.

    Anyone know the cause, not just wanting to treat the symptoms here.

    Cheers in advance.
     
  4. Santabean2000 thread starter macrumors 68000

    Santabean2000

    Joined:
    Nov 20, 2007
    #4
    Arrrrrgh! Now all the fans are spinning at full noise.

    What to do? Please help of you can.
     
  5. mmomega macrumors demi-god

    mmomega

    Joined:
    Dec 30, 2009
    Location:
    DFW, TX
    #5
    isn't the OWC sata adaptor for 2011 models specifically?

    I'm not sure... I swapped SSD's in a 2009, 2010 and 2011 and am just stuck with micro-managing them with fan controllers. I set the CPU fans just where I can barely hear them, along with the HDD and ODD fans and have yet to have any issues.
    I've had all 3 of those models since new and they are all 3 still being used 5 days/week at work and never get powered off. No issues yet.
     
  6. Santabean2000 thread starter macrumors 68000

    Santabean2000

    Joined:
    Nov 20, 2007
    #6
    The adaptor is for the 09 imac:
    https://eshop.macsales.com/item/OWC/DIDIMACHDD09/

    Initially it was the CPU fan going crazy. After software update/install to El Capitan all the fans now blast full speed.
     

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