Question about iMac heat.

Discussion in 'iMac' started by Whimseh, May 24, 2010.

  1. Whimseh macrumors member

    Joined:
    May 24, 2010
    #1
    Hello everybody, I have a question about my 21.5" iMac's heat.

    It's been getting really hot, even when just browsing the web. So I found iStat Menus.

    Here's what it came out with;
    (Fahrenheit, Celcius)

    Ambient - 86F, 30C.
    CPU - 122F, 50C.
    Mem Controller - 126F, 52C.
    Northbridge - 138F, 58C.
    Optical Drive - 120F, 48C.
    Power Supply 2 - 158F, 70C.

    Now, are any of these out of the ordinary? Oh yeah, and one last thing, is it okay to even mess with the fan speeds?
     
  2. Kristenn macrumors 6502

    Joined:
    Aug 30, 2009
    #2
    My CPU is 133 in Fahrenheit

    Might want to change it to Celsius though because Intel I think reports top temps in that... and most people use iStat that way. It will be easier for people who have iMacs to tell you if it's OK.
     
  3. Whimseh thread starter macrumors member

    Joined:
    May 24, 2010
  4. BlackViper macrumors member

    Joined:
    Mar 2, 2010
    #4
    Same as mine

    That is about the same temps my iMac runs. The aluminum case is used as a heat-sink and will get warmer than other cases. Fan controll software basically trades wear on the fan for wear on the other components, you can use, or not, I don't really think it matters.
     
  5. Kristenn macrumors 6502

    Joined:
    Aug 30, 2009
    #5
    Seems really normal to me. Might want to worry if the processor gets over 90c (the fans shouldn't let it go over that for a long period of time like say five minute...) and I say that not because it could damage the CPU but because it could probably damage the HD if the whole computer heats up.

    It looks normal and I guess it's ok to mess with fan speeds. I never do... never saw the point. It's built and programed to run at different speeds at different times when the computer knows it's hot enough or cool enough. To me... speeding up the fans to run full blast even when you have 60c or even 70c CPU or even 50c spells wear out your fans faster than they normally would. But that's just my opinion.

    Hope I helped. I don't own a new iMac though. The iMac I have doesn't have a fan... that I know. I use a MBP.
     
  6. Heilige macrumors newbie

    Heilige

    Joined:
    Apr 3, 2005
    #6
    My temps run a little higher with light use on my 21.5" iMac... My question is will this shorten the life of my iMac?
     
  7. miniroll32 macrumors 65816

    miniroll32

    Joined:
    Mar 28, 2010
    #7
    Those are perfectly normal temps. My white MacBook runs at 62 Celsius when its just idle! Web browsing takes me up to 65, and Flash content... Just don't put it on your lap!
     
  8. SXR macrumors 6502a

    SXR

    Joined:
    Nov 20, 2007
    Location:
    Netherlands
    #8
    Those temperatures dont look weird to me , mine are about the same. Just the power supply is colder than yours.
     
  9. mtnDewFTW macrumors 6502a

    Joined:
    Oct 26, 2009
    Location:
    San Francisco, CA
    #9
    Here's mine. We seem to be pretty close heat wise.
     

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  10. TMRaven macrumors 68020

    TMRaven

    Joined:
    Nov 5, 2009
    #10
    Those temps are just fine-- ice cold compared to apple's other products, both past and present.

    However I'm not digging that ambient temp, 30c seems like a blazin environment to live in.
     
  11. SXR macrumors 6502a

    SXR

    Joined:
    Nov 20, 2007
    Location:
    Netherlands
    #11
    Thank god those are in Farhenheit. :p
     
  12. ouimetnick macrumors 68020

    ouimetnick

    Joined:
    Aug 28, 2008
    Location:
    Beverly, Massachusetts
    #12
    The temps are fine You should be a little concerned if CPU temps were 180F or higher. My brothers Early 2008 15" MBP CPU heats up to 218F under full load with fans at 6200RPM, so 113F is nothing.
     
  13. 0sync0 macrumors regular

    Joined:
    Feb 8, 2008
    #13
    How warm does the case get?

    My sister bought her first Mac the other day - a 27" i5 iMac. She said the case did not get hot. However, the sound was bad and the computer was replaced.

    The next one had a case that did get hot and it failed the first day.

    When I was helping her decide on whether to get a C2D or i5 I was wondering if the quad core generated a lot more heat.
     
  14. SXR macrumors 6502a

    SXR

    Joined:
    Nov 20, 2007
    Location:
    Netherlands
    #14
    Well, the alluminium case does get hot, but only at the top of the iMac where the air vent is . It doesnt really get hot at the bottom of the machine.
     
  15. archipellago macrumors 65816

    Joined:
    Aug 16, 2008
    #15
    as has been posted in other threads, the real problem with heat is the HDD.

    Anything consistently north of 50 C is asking for (and will receive!) trouble.
     
  16. SXR macrumors 6502a

    SXR

    Joined:
    Nov 20, 2007
    Location:
    Netherlands
    #16
    My HD is 54 C , I guess thats not boiling hot....
     

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