Heat & fanspeed in the new iMacs

Discussion in 'iMac' started by cloud 9, Oct 4, 2007.

  1. cloud 9 macrumors regular

    Joined:
    Aug 14, 2004
    Location:
    Belgium
    #1
    So with all the reading here about issues with the new imac, i was wondering, what are kinda normal temperatures and fanspeed for the new imacs. I have a 24" 2.4 imac. so anyone else wants to post his stats. This is my result for just doing some easy internet:

    temp:
    cpu: 36° C
    mac hd: 42° C
    gpu diode: 49° C

    fan speed:
    cpu and hard disk, both 1200rpm

    and my computer is for 46 minuts on.

    so anyone else has some stats to compare?
     
  2. RevToTheRedline macrumors 6502a

    RevToTheRedline

    Joined:
    Sep 27, 2007
    #2
    Man you're computer is COOL.

    mine spends a lot of time at 47C CPU idle, 82C power supply idle, 58C HDD idle. But no lock ups due to heat.

    700 rpm optical, 1200 rpm cpu, 1200rpm hdd is the idle fan speeds.
     
  3. RRK macrumors 6502

    RRK

    Joined:
    Mar 14, 2007
    Location:
    USA/Ohio/Columbus
    #3
    Mine is more like yours.

    CPU heatsink- 45
    GPU diode- 60
    HDD- 58
    Airport card- 64
    Power Supply- 72C

    fans were at 700, 1200, 1800rpm
     
  4. RevToTheRedline macrumors 6502a

    RevToTheRedline

    Joined:
    Sep 27, 2007
    #4

    Finally! Someone with close to the same temps as me, I thought for sure I had something wrong with mine.
     
  5. RRK macrumors 6502

    RRK

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    USA/Ohio/Columbus
    #5
    Well lets hope we don't just have the same problem.

    I ordered mine the day it was released and upgraded the 2.8 version with the 750 HDD.
     
  6. nawks macrumors newbie

    Joined:
    Oct 2, 2007
    Location:
    Far Far Away.
    #6
    hmm. mine's pretty warm as well.
    CPU - 44
    GPU - 56
    HDD - 54
    Airport card - 59
    Fans - 700, 1200, 1200 (jumps around a little)
     
  7. RevToTheRedline macrumors 6502a

    RevToTheRedline

    Joined:
    Sep 27, 2007
    #7
    It appears that iMac temps are quite similar to the MBP.

    And that makes perfectly good sense too, cause the iMac is built like a laptop or a tablet PC.
     
  8. RRK macrumors 6502

    RRK

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    #8
    I am getting the feeling that these iMacs that are running about 10C warmer in the power supply may be related to the 750GB HDD. Doesn't really worry me at this point.
     
  9. RevToTheRedline macrumors 6502a

    RevToTheRedline

    Joined:
    Sep 27, 2007
    #9
    I believe that if heat was going to cause problems with the power supply, it definitely would have cause permanent problems by now. Don't you think?
     
  10. psonice macrumors 6502a

    Joined:
    Jul 22, 2005
    #10
    No, more likely it would just shorten the life of the imac. Power supplies tend to have capacitors in them (or at least they did when I worked in electronics repairs a few years back), and capacitors tend to 'wear out' a lot faster when they get hot. Capacitors failing was a common cause of power supply failure when I was repairing them.

    I have a 2.8 too, so let's hope that the temperatures are well within what apple designed for.
     
  11. RevToTheRedline macrumors 6502a

    RevToTheRedline

    Joined:
    Sep 27, 2007
    #11
    I plan on keeping this iMac for a good 3 years. If it fails I'll just take advantage of the Apple Care.
     
  12. vansouza macrumors 68000

    vansouza

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    Mar 28, 2006
    Location:
    West Plains, MO USA Earth
    #12
    How do you know?

    What program do you use to find out the temps?
     
  13. RRK macrumors 6502

    RRK

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    Location:
    USA/Ohio/Columbus
    #13
    I went ahead and bumped up my fan speeds a bit to bring my temps down to the lower levels that have been posted.

    OD-1200/HDD-2000/CPU-1500rpm

    CPU Heatsink- 41C
    GPU Diode- 52C
    HDD- 56C
    Power Supply- 61C
    Airport- 55C
     
  14. vansouza macrumors 68000

    vansouza

    Joined:
    Mar 28, 2006
    Location:
    West Plains, MO USA Earth
    #14
    what programs

    what do you us to scope the temps and to adjust the fan speeds please... thanks.
     
  15. RRK macrumors 6502

    RRK

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    USA/Ohio/Columbus
    #15
    smcFanControl & Temperature Monitor
     
  16. imacan macrumors regular

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    Jan 14, 2007
    Location:
    Montreal, Canada
    #16
    try here for stats:

    http://www.islayer.com/
     
  17. RRK macrumors 6502

    RRK

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    #17
    iStat only shows 8 temps while Temperature Monitor shows 12.
     
  18. RevToTheRedline macrumors 6502a

    RevToTheRedline

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    Sep 27, 2007
    #18
    iStats shows all temps if you display it in vertical mode.
     
  19. RRK macrumors 6502

    RRK

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    #19
    That's an interesting feature, but there is still somehow one less on iStat.
     
  20. RevToTheRedline macrumors 6502a

    RevToTheRedline

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    Sep 27, 2007
    #20
    On you're right, iStat doesn't show cpu core temps.
     
  21. RRK macrumors 6502

    RRK

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    Mar 14, 2007
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    USA/Ohio/Columbus
  22. vansouza macrumors 68000

    vansouza

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    Mar 28, 2006
    Location:
    West Plains, MO USA Earth
    #22
    hate to bother

    but smcFanControl seems to only install on MacBookPros.
     
  23. RevToTheRedline macrumors 6502a

    RevToTheRedline

    Joined:
    Sep 27, 2007
    #23
    smcFanControl 2 :)
     

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