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iMac G5 hardware temperatures & monitoring

Discussion in 'PowerPC Macs' started by bah-bah'd, Apr 11, 2006.

  1. macrumors regular

    I use this dashboard widget iStats nano, which has always shown temperatures that seem off. Incoming air always reports +100 F temperature even when room temp fluxs between 55 & 90 F... I assume that the heat sensor is inside the iMac :D but is it really measuring incoming air temps so far inside that the air temp is already normalized?

    My machine pretty much reports this always, no matter what the environment and usage load... Is this normal?

    CPU 160
    GPU 150
    HD 120
    AIR 100

    Edit: (I can't believe I forgot) 20" iMac G5 w/ iSight
  2. Demi-God (Moderator emeritus)


    Which revision iMac G5 do you have, and what size is it?

    The one in my sig usually measures:
    CPU - 160 F
    HDD - 130 F

    I don't know where the other temps are coming from. When I downloaded iStat nano, those were the only two temperatures it gave me.
  3. Demi-God (Moderator emeritus)


    I would say those temperatures are perfectly normal (just ignore the "Air temp, that is weird).
  4. macrumors 68000


    wow, those numbers seem a smidge high. especially the CPU... i was worried about my CPU over heating once so i told Apple and the dude told me about 150˚ is about all. are u sure ur system still works? i'd report this to Apple.
  5. macrumors Penryn


    I just got.

    CPU 150 F
    HD 129 F

    170 F is normal for 100% CPU load and I believe shut off is at 185 F.
  6. dcv
    macrumors G3

    Aaarrgh, why can't everyone use Celsius so I can understand your numbers? :p

    I use X-Resource Graph for my stats, which usually reports my 20" iMac CPU somewhere around 62-66C (approx 143-151 F) and the 17" iMac around 68-73C (approx 154-163 F). Both are 2.0GHz revision B iMacs.
  7. macrumors 68030


    Gets about 74C when you push my iMac (no not literally off the desk) but it has shut down on me once during a Halo session :eek:
  8. macrumors 68030


    CPU = 65c
    GPU = 55c
    Air = 36c
    HD = 46c
    GPU Ambient = 56c
    Mem controller ambient = 62c
    Optical drive = 39c
    Mem controller = 75c

    CPU Fan = ~1400 rpm
    HD = ~1900 rpm
    Optical drive = ~1600 rpm

    Yes please use metric units....:D

    iMac in sig ;)
  9. macrumors 601


    17" iMac G5 1.9GHz

    CPU - 145º F
    HD - 120º F
    GPU - 167º F
    Optical Drive - 105º F
  10. macrumors 601


    why doesn't everyone use Kelvin so i can understand your numbers T____T :p
  11. macrumors Penryn


    I can understand Kelvin more than I can understand Celsius. :rolleyes:
  12. macrumors member


    It is STANDARD for my CPU to idle around 170 F....and when it's running under a full load, it consistently approaches 200.

    It makes me so uncomfortable (considering I had a rev.A that fried) that I always run the system with the processor on the reduced setting.

  13. macrumors Penryn


    I find Automatic just fine. It starts to get noisy around 50-60% usage.
  14. Demi-God (Moderator emeritus)


    200 F seems to be too high. I surprised your computer hasn't shut off by that point. Have you tried another temp monitor to make sure it is accurate?
  15. macrumors 68030


    Sometimes my iMac heats up my room when it gets cold...The highest temp I've ever pushed it was 170-171?F, and it was cookin!!
  16. macrumors 68030


    Somethings wrong with your computer...unless you are using your computer in the desert at noon.:D

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