Is this temperature normal for an Intel iMac?

Discussion in 'iMac' started by prominence, Feb 5, 2008.

  1. prominence macrumors regular

    Joined:
    Jan 31, 2008
    #1
    Hey everyone.

    I have a 2.8 Core 2 Extreme Intel Aluminum iMac with 4Gigs RAM from Crucial.

    I leave my iMac on 24/7 (with screen display turned off during nights).

    The top of my iMac in the back and top, and especially the top right hand corner, is extremely hot -- very hot to the touch, not to the point of actually burning my hand, but very hot.

    Can any of you technical people look at these temps provided by istats and tell me if they are normal?

    The iStat reads as follows:

    TEMPERATURES:
    CPU A - 122 degrees
    GPU - 142
    GPU Diode - 144
    GPU Heatsink - 140
    Ambient - 79
    Memory Control - 126
    Airport Card - 126
    HD Bay 1 - 133

    FANS are running at:
    CPU Fan - 1240 RPM
    Hard Drive Fan - 1347 RPM
    Optical Drive Fan - 853 RPM

    Thank you all!
     
  2. Leon Kowalski macrumors 6502a

    Leon Kowalski

    Joined:
    Sep 20, 2007
    Location:
    Gondwanaland Reunification Front HQ
    #2
    HD Bay 1 is too hot (56 C). Check the manufacturer's spec -- betcha it's either
    55C or 60C maximum ambient operating temperature (depending on model).

    ...heat kills hard drives,

    LK
     
  3. Morod macrumors 68000

    Morod

    Joined:
    Jan 1, 2008
    Location:
    On The Nickel, over there....
    #3
    I have a 24" 2.4 and 4GB. I only turn off or restart my iMac after a software update. I do sleep the machine when I go to bed each night, as well as turn off the monitor when it's inactive more than 15 minutes.
    Here are my iStat readings:
    TEMPERATURES:
    CPU A - 101 degrees
    GPU - 121
    GPU Diode - 122
    GPU Heatsink - 117
    Ambient - 76
    Memory Control - 110
    Airport Card - 104
    HD Bay 1 - 108

    FANS are running at:
    CPU Fan - 1199 RPM
    Hard Drive Fan - 1198 RPM
    Optical Drive Fan - 698 RPM

    ON EDIT: These temps were taken 1 hour after waking the iMac from sleep, so they are a tad on the cool side. I will repost later once the iMac has been on for some time.

    Good luck with whatever you find is wrong.
    Morod
     
  4. AlexisV macrumors 68000

    AlexisV

    Joined:
    Mar 12, 2007
    Location:
    Manchester, UK
    #4
    We've been here before. Everybody's hard drive gets to the high 50's under load. And as also been said, the manufacturer's website is not the be all and end all and it's pretty unlikely Apple have 'forgotten' to keep the hard drive within acceptable limits.

    There's nothing to worry about.
     
  5. Leon Kowalski macrumors 6502a

    Leon Kowalski

    Joined:
    Sep 20, 2007
    Location:
    Gondwanaland Reunification Front HQ
    #5
    I've never seen mine get above the low-40C's. It idles in the mid-30C's.

    Believe what you like; the drive cares not.

    ...I'm not worried -- it's not my drive,

    LK
     
  6. prominence thread starter macrumors regular

    Joined:
    Jan 31, 2008
    #6
    Hey LK, I really apperciate your help. I am a complete newbie so I'll sort of need your guidance figuring this out. Is the Manufaturer and stuff about my HD under "About This Mac" ?

    Also, what should I do to get the temp down -- turn up the fan? I've heard of people messing with this, but I also heard it's dangerous to mess with automatic settings.

    What should my course of action be?

    Thanks LK!
     
  7. gorby macrumors 6502

    Joined:
    Oct 20, 2007
  8. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #8
    Mine is 42C at the moment but has been known to get into the upper 50s under load and above 50C idling in the summer months.

    I am quite sure that Apple considered the HD temperature limits when they designed these machines.

    Have you been reading about excessive drive failures in the aluminum iMacs anywhere?? All I read on the issue is a bunch of forum posts from those who worry that their drives might be running at excessive temps. It's been 6 months now with this revision so you'd have to figure we would have had SOME indication of a failure trend if it was indeed a design flaw.

    I wouldn't worry about it too much. I do recommend Applecare and of course the good common sense of backing up your data that applies to ANY computer. I've got 3 full years of free replacements should the HDD fail for any reason.

    Don't worry, be happy. :)
     
  9. Leon Kowalski macrumors 6502a

    Leon Kowalski

    Joined:
    Sep 20, 2007
    Location:
    Gondwanaland Reunification Front HQ
    #9
    Yep. The internal drive model number can be found under:

    About This Mac > More Info... > Serial-ATA

    It'll be sumpin' like: "WDC WD5000AAJS" or "Seagate ST3500630AS"

    Many folks on the Apple support forum (http://discussions.apple.com)
    have reported success with smcFanControl. In most cases, just a few
    hundred more rpm seems to bring internal temps down quite a bit.

    http://www.macupdate.com/info.php/id/23049/smcfancontrol

    If you search the Apple forum for "smcFanControl", you'll find many
    internal temperature listings "before & after" adjusting fan speeds.

    I don't have any first-hand experience with it (because my iMac has
    never had the slightest temperature problem) -- but as I understand
    it, smcFanControl simply raises the fans' minimum "idle speed", but
    does not interfere at all when/if the standard iMac firmware decides
    to increase fan speed(s) above the "idle" setting.

    BTW, here's an interesting article, posted on another thread as "proof"
    that high HD temps are "no cause for concern." Sounds reassuring --
    until you look at what the expert authors considered "the high end" of
    the operating range. They apparently thought it a huge waste of time
    to conduct tests at insanely high HD temperatures -- above 50C.

    http://209.85.163.132/papers/disk_failures.pdf

    ...good luck,

    LK
     
  10. prominence thread starter macrumors regular

    Joined:
    Jan 31, 2008
    #10
    LK, Thank you.

    I think mine may run hotter since it is the 2.8 extreme model.

    I turned up all my fans moderately, but the HDD fan had to go up to 2100rpm to get the Hard Drive under 50, it's resting around 47-48 now.

    I feel better now. And it's not as hot to the touch any more! Thank you for your assistance. :)
     
  11. AlexisV macrumors 68000

    AlexisV

    Joined:
    Mar 12, 2007
    Location:
    Manchester, UK
    #11
    We had a pretty much identical thread about 3 weeks ago with many people reporting temps of 50+

    I'd love to see the look on the guys face if I took my Mac back to the store with your concerns and asked for a refund.

    Well I'm not worried, so that makes everybody happy.

    With the possible exception of everybody else on the board who you seem to be on a mission to scare with tales of how their Mac's hard drive will fail prematurely.
     
  12. Leon Kowalski macrumors 6502a

    Leon Kowalski

    Joined:
    Sep 20, 2007
    Location:
    Gondwanaland Reunification Front HQ
    #12
    Uh, if memory serves, that was when "someone" said:

    "But I don't think we've seen anyone with idle HD temps in the 50's."

    http://forums.macrumors.com/showpost.php?p=4731980&postcount=8

    ...I won't mention any names,

    LK
     
  13. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #13
    Personally I would worry much more about prematurely ending the lives of the fans not to mention my machine running louder (or in my case making any noticeable sound at all) but to each their own. :p
     
  14. prominence thread starter macrumors regular

    Joined:
    Jan 31, 2008
    #14
    I'd rather a fan have to be replaced than a hard drive crash. But I understand that concern as well, lol!
     
  15. SaSaSushi macrumors 68040

    SaSaSushi

    Joined:
    Aug 8, 2007
    Location:
    Takamatsu, Japan
    #15
    Touche. I'd rather have neither fail. My personal opinion is you're much more likely to see a fan running above default speeds fail on your iMac than a hard disk. That's ignoring completely the issue of the added noise if it matters to you.

    Plus, if one properly backs up their data they needn't fear HD crashes.

    I'm glad you found a solution that suits you. Best of luck with it.
     
  16. nickf macrumors member

    Joined:
    Oct 2, 2007
    #16
    I also agree with this point of view. I trust Apple's engineers here.

    If the default fan speed needs tinkering with, I suspect we'll see it in a patch from Cupertino.
     
  17. deviousxen macrumors newbie

    deviousxen

    Joined:
    Dec 13, 2006
    #17
    HD bay 1: 112

    Model Name: iMac
    Model Identifier: iMac7,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.8 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 4 MB
    Memory: 2 GB
    Bus Speed: 800 MHz


    I usually am coloring comics in on photoshop while listening to music via iTunes. That reading was done when Safari was open as well (LOL!!!!11).

    I need a new external cause I have 500 gigs now versus my dead mbps amount. But I'm working on that I guess.

    Should I just keep my room nice and cold?:eek:

    EDIT: After running Photoshop cs2, the HD bay is running at 135. Should I be scared?
     

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