iMac Fan Speeds + Noise

Discussion in 'iMac' started by u2dy, Sep 23, 2010.

  1. u2dy macrumors newbie

    Joined:
    Jun 10, 2010
    #1
    Hi guys. I bought one of the new-gen iMacs last month--my first Mac!

    Anyway, here's what's up:

    My computer will often start making a low-droning noise, and it sounds like a fan. I have iStat, and usually during this time it will say that my Optical Drive and CPU Fan are both running at around 4000rpm.

    This happens when there is very little CPU usage too. It's happening right now, and I only have firefox running.

    Is this normal? If not, what should I do?

    Thanks!! :)
     
  2. mulo macrumors 68020

    mulo

    Joined:
    Aug 22, 2010
    Location:
    Behind you
    #2
    I don't know what it could be, but it sure isn't normal.
     
  3. iCaleb macrumors 6502

    Joined:
    Apr 26, 2010
    Location:
    USA
  4. Spike88 macrumors 6502a

    Joined:
    Jan 25, 2010
    #4
    Hi u2dy.

    Using iStat Nano (widget) and Print Screen (CMD+Shift+4 keys), please show us your iMac internal heat numbers and internal fan speeds. Need to see screen print pictures because of multiple fan speeds and multiple temp sensors.

    For example (for my iMac 21.5" system):
    http://i178.photobucket.com/albums/w251/Spike99-Pictures/New%20iMac%20system/InternalTemps2010-08-30.png
    http://i178.photobucket.com/albums/... iMac system/FanControlSettings2010-08-30.png

    If wondering, FREE iStats Nano available at: http://www.islayer.com/apps/istatnano/

    thanks.

    .
     
  5. u2dy thread starter macrumors newbie

    Joined:
    Jun 10, 2010
    #5
    Sorry that my reply took a while..I had to wait until my mac's fan started back up again!

    Here's a screen shot of my iStat.

    [​IMG]

    Thanks for any help! This makes me nervous.
     
  6. Teqnilogik macrumors member

    Joined:
    Sep 16, 2010
    #6
    Out of curiosity, what is the temperature of the room the iMac is in? Room temperature can affect how hot the iMac's internals are.
     
  7. Spike88 macrumors 6502a

    Joined:
    Jan 25, 2010
    #7
    What is the exact year and model and screen size of your Mac as well?

    re: MBP, Mac Air, iMac ? if iMac, is it a 21.5" or 27" model?

    These details are critical as well....

    .
     
  8. u2dy thread starter macrumors newbie

    Joined:
    Jun 10, 2010
    #8
    It's the newest generation 21' iMac. I bought it in August.

    The room that the computer is in DOES run a little warmer than the rest of my home. But, still, I'm sure that it's rarely warmer than 75 degrees.
     
  9. u2dy thread starter macrumors newbie

    Joined:
    Jun 10, 2010
    #9
    bump.

    Is this an issue that I should just contact Apple about?
     
  10. Teqnilogik macrumors member

    Joined:
    Sep 16, 2010
    #10
    Those temps look okay to me. All are close to 30 C which is really good. I don't see a reason fir the CPU fan to be running near 4000 RPM. The optical drive fan seems to be running too fast for it's temp as well. You may want to contact Apple about this. Maybe a temp sensor is malfunctioning or something.
     
  11. u2dy thread starter macrumors newbie

    Joined:
    Jun 10, 2010
  12. Teqnilogik macrumors member

    Joined:
    Sep 16, 2010

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