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  1. #1

    LoganTyler's Avatar
    Member Since
    Oct 13, 2011
    Location
    Los Angeles, CA
    Posts
    51
    Specs:
    21.5" 2011 iMac 2.5Ghz i5 16GB RAM DDR3 1333MHz
    iMac 2011 Temperature
    My iMac is 137F or 58C as of right now. What are normal temperatures? Is this too hot? I usually only use Skype, Safari and iTunes. Would it help if I kept my room temperature down? Thanks!

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    49,482
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, Sierra
    Which temperature is reading 58 degrees C?

    Your iMac has three fans and three main temperature readouts:

    1. CPU

    2. Hard Drive

    3. Optical Drive

    For example: Right now my CPU is reading 37 degrees C with a fan speed of 1200 RPM. I have the same iMac as you do.

  3. #3

    LoganTyler's Avatar
    Member Since
    Oct 13, 2011
    Location
    Los Angeles, CA
    Posts
    51
    Specs:
    21.5" 2011 iMac 2.5Ghz i5 16GB RAM DDR3 1333MHz
    The CPU diode was 58 C. I have iStat.

  4. #4

    Dysfunction's Avatar
    Member Since
    Mar 17, 2008
    Location
    Tucson, AZ
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    6,881
    Specs:
    Way... way too many specs to list.
    Nope. Not too hot. There is far more focus on temperature than is really needed. The circuits are designed to throttle back, then shutdown when operating ranges are exceeded. Ya got another 42 degrees before you'd start to hit any thresholds.
    mike
    This machine kills fascists
    Got # ? phear the command line!

  5. #5


    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    20,911
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    Perfectly normal.

    You are on a Mac now. You do not have to "manage thermal anomolies" anymore.

  6. #6

    LoganTyler's Avatar
    Member Since
    Oct 13, 2011
    Location
    Los Angeles, CA
    Posts
    51
    Specs:
    21.5" 2011 iMac 2.5Ghz i5 16GB RAM DDR3 1333MHz
    Thanks everyone!

  7. #7


    Member Since
    Jun 22, 2012
    Posts
    12
    I am a new iMac user, and I was worried about temps. I have managed mine via smcFanControl which sets minimum fan speeds only and cannot go below Apples default settings. This is my current reading from Tunabelly Temperature Gauge.

    Optical Drive Fan 2300RPM
    Hard Drive Fan 2300RPM
    CPU Fan 1800RPM 33 degrees C
    GPU 48 degrees C

    This is with two monitors running, web browser, youtube playing and using the Trillian IM client.

  8. #8


    Member Since
    Jun 24, 2012
    Posts
    15
    my cpu runs at around 46 degrees on average but it has gone up past 50. but my last logic board stopped sending the temperature signal from the cpu and kept the fans on full all the time before it died

  9. #9

    Dysfunction's Avatar
    Member Since
    Mar 17, 2008
    Location
    Tucson, AZ
    Posts
    6,881
    Specs:
    Way... way too many specs to list.
    Quote Originally Posted by popmanw View Post
    I was worried about temps.
    Why? Yes, I'm absolutely serious. Why?
    mike
    This machine kills fascists
    Got # ? phear the command line!

  10. #10


    Member Since
    Jun 22, 2012
    Posts
    12
    Quote Originally Posted by Dysfunction View Post
    Why? Yes, I'm absolutely serious. Why?
    Because I was used to PC's that have a lot more customisation control... and then moving to Mac where at one point it was very warm to touch just alerted me. I then heard reports that Apple set fan speeds to low by default for marketing purposes: quiet hardware. Whether this is true or not, it still alerts a new user.

    The heat concerns mainly occur in Boot Camp situations though. I don't think Boot Camp has been developed very well - it needs a fan utility as part of the support software.

  11. #11

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    49,482
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, Sierra
    The heat concerns mainly occur in Boot Camp situations though. I don't think Boot Camp has been developed very well - it needs a fan utility as part of the support software.
    Apple engineers are very capable and their machines have been designed to operate at those temperatures. What you heard is nonsense.

    Besides, if you want a fan utility that works in a dual boot Windows environment you can download and install the free SMCFanControl for Windows from here.

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