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  1. #1

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    I have a 12 inch PB and recently put a widget that tells what the CPU temperature is. I'vr seen it go up to 45-50 deg celsius sometiimes. Is this too high? How accurate is the widget? What's the significance of running the PB on higher temps?

  2. #2
    Danamania Guest

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    Originally posted by shtan72@Aug 6 2005, 05:01 PM
    I have a 12 inch PB and recently put a widget that tells what the CPU temperature is. I'vr seen it go up to 45-50 deg celsius sometiimes. Is this too high? How accurate is the widget? What's the significance of running the PB on higher temps?
    Depends on the CPU in question. Some modern CPUs (including some G4s and not a small number of AMDs) have manufacturer defined maximum temps nearing 110C. Yes, that's high enough to boil water. The days where CPUs don't run well over 40C are long gone, and while it won't hurt them to be cooled down that low expending the affort and worry to keep them down at those levels isn't worth it - of course with a powerbook, keeping it cool enough to not physically annoy you is another matter entirely . As for accuracy, Usually the temperature readings from PPC chips themselves is accurate to +/- 5C, which is a pretty wide range - worth keeping in mind too

    I'm sure there are people around here who could tell you the exact specs of the G4 in your model powerbook, and tell you that chip's exact maximum operating temperature.

    dana

  3. #3

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    my quicksilver use to bum out at 57.3 celcius but thats a 7440
    Just Chillin.

  4. #4

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    To give you a rough guide, my iMac G5 runs at around 60-65C when set at 'Automatic' processor performance, but jumps up to around 75-80C when set to 'Highest' processor performance, which is pretty hot, but it's a G5, so is to be expected. My G5 tower at work runs about 20C cooler than that on the same settings. By my calculations, a G4 processor should be running even cooler than that.
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  5. #5

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    My iMac G5 sits between 60-80 most of the time, nothing to worry about

  6. #6

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    15" G4 pBook (1.5Ghz) with 1 GB RAM - with Azureus running, maybe also watching VLC, mail, safari, iChat, iTunes, a dozen or so widgets, quicksilver, temperature monitor and activity monitor, it will rarely go past 60?, and even if it does, the fan will kick in and it may reach 63?, before coming back down to 55-59?.

    spotlight re-indexing or photshop elements of iPhoto (on top of the above) will usually push things past the 60 mark.

    btw temperature monitor lets you monitor the temps of 4 different areas, so is pretty accurate.

    edit i had actually put in the degrees celsius symbol via the special characters menu, so am surprised to see a ? symbol...!?
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  7. #7

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    the g5 proccessor is designed to run at high temps, but the G4's arnt.. so if it goes anywhere near 60 its too hot.
    Just Chillin.

  8. #8

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    Originally posted by ipod_man@Aug 6 2005, 10:13 PM
    the g5 proccessor is designed to run at high temps, but the G4's arnt.. so if it goes anywhere near 60 its too hot.
    There are a few other threads discussing CPU temperature:

    Jimbo's dying G4

    Is heat really an issue?

    iBook G4: fan on constantly

    In most of these threads - yes G4 and G5 CPUs run hot - but if it's not crashing or doing anything wacky, don't worry about it.

    JB

  9. #9

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    Just installed Temperature Monitor on my MBP and it reports Core 1 at 89 C, core 2 at 86 C and HD at 42 C.

    MBP is elevated on a stand with plenty of air flow.
    It is on 24/7 running BOINC.

    Do I need to worry about the heat? I did some searching, and most people report 80 C under max load.

    The room temperature is about 25C. I hate to think what will happen in summer.

  10. #10

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    it is a little hot but wasent there a problem with hot MBPs and the thermal paste not being applied properly? Personally I dont think it is a problem because I believe those CPUs run in the 70s regularly in PC laptops and since the MBP is even thinner then the temps will probably be a little higher. Maybe something to get checked tho...
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  11. #11

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    <div class='quotetop'>QUOTE(ipod_man &#064; Aug 6 2005, 10&#58;13 PM) [snapback]87662[/snapback]</div>
    the g5 proccessor is designed to run at high temps, but the G4&#39;s arnt.. so if it goes anywhere near 60 its too hot.
    [/b]
    My iBook G4 maxes out at about 65║ - that&#39;s if I leave it transcoding video or something like that. I&#39;ve never had any issues with stability or anything at those temps. On a hot day I will regularly get near 60║.

    What&#39;s the supposed high temp limitation of an iBook G4 12" 1.33Ghz CPU?
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  12. #12

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    <div class='quotetop'>QUOTE(forgie &#064; Sep 29 2006, 10&#58;53 PM) [snapback]219494[/snapback]</div>
    My iBook G4 maxes out at about 65║ - that&#39;s if I leave it transcoding video or something like that. I&#39;ve never had any issues with stability or anything at those temps. On a hot day I will regularly get near 60║.

    What&#39;s the supposed high temp limitation of an iBook G4 12" 1.33Ghz CPU?
    [/b]
    I think he is talking about desktop CPUs. Laptop CPUs ALMOST ALWAYS have a higher Temp Threshold than Desktop CPUs because obviously they cant be cooled efficently. The 7447A CPU has a Junction Temp max of 105C so youve got absolutely no problem...If you start hitting 90+ in summer then if you prolong use you may turn the CPU into a fried block of silicon ...The process of electromigration starts to really accelerate at around 80-90ish C on the laptop G4 CPUs. Or so I believe...I could be way off here but I say what I think is true for virtually any CPU.
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  13. #13

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    My PowerBook sits at about 50 degrees. On a hot day it can get up to 60. I have seen it up to 67, but the fan kicked in, and just about deafened me, and brought it back to about 62

    My Quad sits at about 48 degrees idle, and when it takes off can get up to 59, but that&#39;s about the max.

  14. #14

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    <div class='quotetop'>QUOTE(ipod_man &#064; Aug 6 2005, 10&#58;13 PM) [snapback]87662[/snapback]</div>
    the g5 proccessor is designed to run at high temps, but the G4&#39;s arnt.. so if it goes anywhere near 60 its too hot.
    [/b]
    My iBook G4 runs at 65 deg berfore the fan kicks in somties it goes as hight as 69


    <div class='quotetop'>QUOTE(forgie &#064; Sep 29 2006, 10&#58;53 PM) [snapback]219494[/snapback]</div>
    My iBook G4 maxes out at about 65║ - that&#39;s if I leave it transcoding video or something like that. I&#39;ve never had any issues with stability or anything at those temps. On a hot day I will regularly get near 60║.

    What&#39;s the supposed high temp limitation of an iBook G4 12" 1.33Ghz CPU?
    [/b]
    I have the exact mac as you for me the fan kicks in at 65 - 69 deg and kicks out at 54 - 56 deg. So anything over 75 - 80 deg could be a problem on an iBook G4.

    Simo

  15. #15

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    My MacBook usually sits between 50║ and 65║ normally, higher when doing more CPU intensive tasks.

  16. #16

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    My G5 DP 2.7:

    [c-71-202-175-182:~] dave% temp.sh
    CPU A 71.9315
    CPU B 69.2951

    Temps can easily hit 85░C when pushed hard.

    Temps on the Xserves here:

    http://www.macdave.us/component/option,com...pper/Itemid,44/

    &

    http://www.macdave.us/component/option,com...pper/Itemid,62/

  17. #17

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    Currently in Darwin it&#39;s about 32 degree&#39;s. A pretty humid day.

    The below attachment shows what my G5 Quad is sitting at

  18. #18

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    <div class='quotetop'>QUOTE(step_andy &#064; Sep 29 2006, 09&#58;09 PM) [snapback]219470[/snapback]</div>
    Just installed Temperature Monitor on my MBP and it reports Core 1 at 89 C, core 2 at 86 C and HD at 42 C.

    MBP is elevated on a stand with plenty of air flow.
    It is on 24/7 running BOINC.

    Do I need to worry about the heat? I did some searching, and most people report 80 C under max load.

    The room temperature is about 25C. I hate to think what will happen in summer.
    [/b]

    Those temps are a bit too high, and i imagine the case is red hot to touch, especially on the strip of metal between the keyboard and the screen.

    You should be able to easily hear the fans running at full speed at those temps, if you can&#39;t really hear the fans, or you need to put your ear up to the case to hear them, then there is an issue with the thermal paste, (which i had). I pulled my machine apart and replaced the thermal paste and temps dropped from as high as yours to around the high 40&#39;s on average, to mid 50&#39;s at high load.

  19. #19

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    <div class='quotetop'>QUOTE(T&#045;D&#045;J &#064; Oct 9 2006, 03&#58;00 PM) [snapback]222617[/snapback]</div>
    Those temps are a bit too high, and i imagine the case is red hot to touch, especially on the strip of metal between the keyboard and the screen.

    You should be able to easily hear the fans running at full speed at those temps, if you can&#39;t really hear the fans, or you need to put your ear up to the case to hear them, then there is an issue with the thermal paste, (which i had). I pulled my machine apart and replaced the thermal paste and temps dropped from as high as yours to around the high 40&#39;s on average, to mid 50&#39;s at high load.
    [/b]
    As soon as I stop BOINC, temperature drops big time. It drops to about 60.
    I can hear fans to kick in now and then. When fans kick in, eg louder than usual humm, temperature drops to 70 ish and climbs back again.
    I e-mailed an Apple centre and they response was that high 80 are fine as long as it does not go over 90 for prolonged periods.

    Yes, the strip gets quite hot. The lower left hand corner is also hot.
    One thing I have not done, is to replace the battery. The original was subject to a recall, and I got a new one the other week which is still sitting in a box. Totally forgot.

  20. #20

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    Importing CD&#39;s into iTunes my Macbook 1.83ghz gets up to 77 deg C which is the highest I have ever seen it.

    Powerbook 17inch 1.67ghz usually runs at 28 deg C. Max temp is about 35 deg C.

    Imac G5 1.8Ghz Rev A. usually runs between 58-66 deg C. Never been higher than about 69 deg C.
    Something about Jimby.

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