Imac temperature

Hi. I have a 20" G5 iMac. It was just cleaned of dust and a complete system diagnostic showed no issues. The memory battery was replaced.
It seems the reference for measuring internal temperatures is out to lunch. It shows 99 degrees f ambient temperature. I suspect that all the measured temps are high as well. The fans run audibly loud. The CPU fan runs about 3300 rpm. The air coming out of the unit is not very hot.
Is there a way to adjust the reference?
Thanks!

I'm thinking "ambient" is a misnomer in iStat Pro. For a true ambient reading, iSP would require a remote sensor well away from the computer (a heat source). Same reason we don't install the household thermostat over the kitchen cooktop.
After my G4 tower sleeps overnight, on morning wakeup, it is seldom at true ambient (room temp) because there are still low-level things happening inside that produce a little heat. The room is 75°F and the G4 is 84-88°F.
Only if I turn the computer off and its stays off for several hours does the initial reading come close to room temps recorded by the workstation. Still a little higher because of the bypass in the power supply that maintains settings,
I like iStatPro for other reasons. but having to invoke a Dashboard widget to check temps can raise them. Widgets are heavy hitters in Activity Monitor, especially those that have to "phone home" to work. When checking temps with a widget, you get "Heisenberged."
I use Temperature Montor, also free, becasue it is a free-standing app and already part of the processor load when you look at temps. You can put the display in the menubar so checking temps requires looking up a few inches. No commnads required.
http://bresink.com/osx/TemperatureMonitor.html
I know of no way to recalibrate sensors, if they go bad they go dead, so I think you may be seeing the effect of a program trying to read something it can't.
Get Temperature Monitor and see what it reports. I thikn it does a better job that iStatPro for temps.

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    I've had the new 24" iMac since last Thursday - absolutely fantastic computer, and I'm thrilled with it. Speed, screen size, everything is great, but I'm quite worried about the temperature of the thing.
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    Should I be worried about this? I haven't had a new-ish Mac in ages, so I'm not sure if it's normal or not.
    Has anyone else experienced this? Thanks all!

    Hello everyone.
    Sorry to Bump this post, but I just got a new 24" iMac after 6 months with a Intel 17" iMac that gave me no problems whatsoever..
    I have read this thread attentively and followed instructions accordingly.. Using Temperature Monitor, my Smart Disk is always at 50-52ºC (~124 F) and my CPU Cores 1 and 2 from 44ºC to 60ºC (thats ~111 F to ~140 F)....
    I came to seek help on this matter because the top part of my 24" iMac is very hot.. too hot to leave my hand there, even... and only after a few hours with the computer on; I run some applications like iTunes, iPhoto, Safari, Messenger (and Temperature Monitor) plus run World of Warcraft on window mode at 1900x1200. Now, I have done all this (and more, live video editing using iMovie) on my 17" Intel CoreDuo iMac for sometimes up to 8 / 10 hours a day and it never got hot enough to become a concern.
    What is going on? According to some posts, the top left part of the iMac is the HD, while the lower part has the CPU Cores. My questions are these:
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    And this only after say, 3 or 4 hours of activity..
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    Henrique
    iMac 24" Intel Core 2 Duo   Mac OS X (10.4.8)  
    iMac 24" Intel Core 2 Duo   Mac OS X (10.4.8)  

  • Snow Leopard, iMac Temperature and Fans?

    Since getting my iMac eighteen months ago I have checked the temperatures regularly.
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    Thanks K T and Pondini.
    That's really what I was looking for Ikrupp, some figures from other users under moderately intensive operations (not writing emails!).
    Yesterday, when I had finished using Compressor the temperature started dropping from almost 180°F and when it reached 176°F the fan had also dropped to 1199rpm so it looks as though it doesn't speed up until the temperature exceeds 176°F.
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  • Another iMac Temperature thread

    iMac 24" 3.06Ghz C2D w/4GB Ram. This is not the machine in my sig.
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    Can anyone confirm that these temps are either high or within operating spec?
    Thanks!

    If those temp are Fahrenheit the are well within specifications. It would be useful to know how much RAM the machine has and how much of that is Free. It would also be useful to know the results of running Apple Hardware Test in extended mode.
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    Active
    Inactive
    Used
    To run Apple Hardware Test in extended mode please click the link for instructions. If you get errors please post the error codes.
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  • Why does my iMac temperature go up when running games through Windows using BootCamp?

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  • IMac temperatures

    Just wondering if this is a normal temp...
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    Power supply 2 : 67-70
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    Thanks!

    Might try smcFan Control. In conjunction with that, I also have a fan blowing at the back of the computer to dissipate the heat from the aluminum back. But not much can be done when it's just a case of hot air being blown around. We've been having a bad heatwave here -- it's 30C inside right now -- and I just don't use the computer as often, allowing it to sleep frequently to cool off. HD  temps constantly in excess of 45C aren't that healthy. I don't let it stay in the upper 40s for long.
    If you use smcFan -- or even without -- you must pay attention to keeping the air intake grilles (there is one running along the bottom and one behind the stand) free of dust by periodic vacuuming,

  • How to check iMac temperature?

    What's an easy, free way to check the temperature of my late 2013 iMac? It's a 21.5 2.7ghz 8gb model with Mavericks. Also, what temperature is it supposed to be at?
    Thanks!

    iStatMenus is a really cool (pun intended) little app that will give you everything you need. There's a 14 day demo to test it out, that may give you the info you need, $16 if you want it longer. There's a bunch of sensors in your machine, the temperature each one is supposed to be varies but something in the 80-100° range is probably "normal" for most of them, but of course will change a little according to ambient temperature, and a lot depending on what you are asking your CPU & GPU to do.
    Get it from the developer here, install is quick and painless:
    http://bjango.com/mac/istatmenus/

  • Definitive Intel-iMac Temperatures?

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    There is just one part of my iMac that appears to me, to be reaching a very high temperature.
    Namely the "Power Supply Position 1" - whatever that may be. When my iMac is working moderately hard it reaches temperatures of 180°F.
    Now although this appears too high to me, it may be perfectly normal but I have no way of knowing this, as Apple has not published (to my knowledge) details of what constitute a safe range of temperatures.
    So has anyone got any definitive data?
    I would like to stress that all the other sensors record very low "safe-sounding" temperatures and I have also recently downloaded the SMCFanControl app.
    Is the temperature of the "Power Supply Position 1" critically important or could it happily soar to boiling point with no adverse effects on the computer?

    It sounds as though your high fan speeds might account for the low temperatures. My fans are at the default setting ...... Optical Drive = 700rpm and the other two at 1,200rpm.
    Only when the PS exceeds 176°F (approaching 80°C) does the CPU Fan speed rise to 1,500 when left to the Apple settings (before I got smcFanControl).
    As you can see from this screenshot, the PS temperature is tremendously ahead of the others.
    This is after about an hour of light use in a fairly cool room.
    Message was edited by: Ian R. Brown

  • Imac temperatures ¿too high?

    Hi,
    I've owned my Imac G5 for about 6 months now, and the other day I had my hand placed on the top of the screen and I noticed it was quite hot for the normal. I live in Spain and its about 36º in the afternoon (96F), maybe its just the Imac facing the summer, I don't now. Anyway, I'll leave the stats of the temperatures from a widget I've got so you can know a little bit more, thanks
    [img=http://img61.imageshack.us/img61/3830/tempsan4.png]

    The information Chris CA gave you was absolutely accurate - if your computer gets too hot, the power supply unit will automatically shut it down when it exceeds the recommended temperature, so until that happens, you don't need to worry about it. And you are posting in the wrong place, this is for PPC iMacs, which have not been produced for several years. You have an intel and he gave you the correct forum to post in.
    His information was not only correct, but useful as well, if you trouble to read and understand it instead of being snarky!

  • IMac temperature comparison

    I thought it would be a good idea to have a topic where we can compare iMac internal temperatures. I have not had any problems with mine and my temps usually stay pretty low but yesterday I was burning several dvds and watching a movie at the same time and all my temps jumped up quite a bit. I cannot tell if the fans are speeding up or not as they are always quiet. I'm a little concerned about my hard drive temp. It usually runs about 53-54C but it was at 57-58C all last night.
    I am monitoring my temps with temperature monitor 4.3 http://www.versiontracker.com/dyn/moreinfo/macosx/19994
    http://ftp.georgetek.com/George/tempmonitor1.png
    http://ftp.georgetek.com/George/tempmonitor2.png
    after a bit of cooling down
    http://ftp.georgetek.com/George/tempmonitor3.png

    George Peters wrote:
    I'm a little concerned about my hard drive temp. It usually runs
    about 53-54C but it was at 57-58C all last night.
    Good reason to be concerned -- high temps seriously affect HD life & dependability,
    and that particular drive specs 60℃ ambient as its maximum operating temperature.
    Your "HD Bay 1" is running uncomfortably close to the limit.
    Here's what Bresink.com's +Hardware Monitor+ says for mine -- about the same
    as always.
    Ambient Air ............................................... 23.0℃
    CPU A Temperature Diode ......................... 33.0℃
    CPU Core 1 ................................................ 24.0℃
    CPU Core 2 ................................................ 25.0℃
    Graphics Processor Temperature Diode ..... 42.0℃
    Hard Drive Bay 1 ....................................... 34.0℃
    Memory Controller .................................... 40.0℃
    Optical Drive ............................................. 30.0℃
    SMART Disk WDC WD2500JS-40TGB0 ....... 32.0℃
    CPU Fan .................................................... 822 RPM
    Fan Hard Drive ........................................ 1398 RPM
    Fan Optical Disk Drive ............................... 799 RPM

  • Tip:  Display brightness affects iMac temperature

    Not a question, just a useful tip for anyone concerned about the temperature of their iMac G5. The brightness of the LCD display can signnificantly affect temperatures inside the machine. So if you are reading high temperatures in your iMac, or the fans are running at higher speeds than you'd like, try going into System Preferences/Displays and adjusting the screen brightness down to the dimmest you can handle. It will take a while to take effect (as the machine needs to cool) but there will be a noticable difference over time.
    This may also reduce eye-fatigue (provided you don't set it too low.
    I was told by an Apple Tech that the reason for this is that the LCD is lit by powerful neon bulbs that output a lot of heat directly next to all of the other components in the machine, so dimming the brightness reduces this heat-output somewhat.

    I have to say, nice tip! I dimmed my iMac's brightness down to the lowest it would go. In about a minute the CPU temp dropped a good seven degrees Celsius.
    Now I'll test it at 50% brightness.

  • Worried about iMac temperature

    My iMac's CPU temperature monitor sometimes goes up to 175˚ Fahrenheit, and stays at 140˚ Fahrenheit constantly. I'm worried about it. What is the average temperature for an iMac? Should I be worried at these temps? Is it damaging to be at these levels for an extended period of time?
    Thanks for your help!
    EDIT: Oops! I put this in the wrong forum. Could a mod please move it? Sorry...

    Max, welcome to the discussions!
    Mine stays around 150-150F also, depending on what I am doing. I wouldn't be concerned about that, bit 175F is pretty warm. Forunately, your Mac should shut itself down before any damage occurs.
    You might want to open yours up and remove some dust and such it there is any around. Clear the vents also. Some people have reported that doing so has reduced their temps.

  • What is the best imac temperature monitor program

    24 inch iMac (OS X 10.6.8, 2.66 GHz Intel Core 2 Duo, 4GB 1067 MHz DDR3)
    The cooling fans do not appear to come on, ever.  BUT the other day after a shut down (normally leave the unit sleeping) the fan (or fans) came on apparently a full speed. At the next wake-up the fan did not come on.  Did shut-down and and the fans did not work at the power up.   I have always though that this unit has run hot, has never had any air flow and the top is always very warm. 
    What can I do to make the fans operate (settings ?) 2. are there programs that can monitor internal iMac temps.
    thanks

    Be wary of cnet downloads page links, as there are several there which
    DO NOT get you the software you seek, and can instead load adware or
    other malware; you can check the outdated version iStat Pro version is
    no longer available from the maker directly, over a year ago.
    There are a few relatively safe/r mirror sites available that appear to have
    the original size file that can get you a clean (as of earlier this year) copy.
    While I checked this, six months ago, I didn't save the link because I have
    an original copy in archive as .zip from the maker's site two years ago. And
    then again, in the Lounge discussions I checked into this topic again:
    A link I found in August 2014 that appears to have provided me a clean
    iStat Pro v. 4.92 download (1MB zip) still works at this mirror...
    http://mac.majorgeeks.com/mg/getmirror/istat_pro,1.html
    {Test the size of the file, what downloads and opens, to be sure that's all it is.}
    PS: the ifixit.com site may have a repair guide that could be helpful in
    cleaning dust out of the cooling fan; however the fan may be defective.
    Good luck & hopefully your download won't include spigot or other adware.
    edited 2x

  • NorthBridge for Temperature worries me

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    HI,
    Check here ...
    Topic : iMac Temperature Comparison
    Carolyn

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    This is the iMacs temperature wile doing online surfing and watching videos.

    You have posted in the iWork > Pages for Mac community. I have requested the hosts to move your post over into the Mavericks community, where it will get better visibility.

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