CPU on iMac is 58 celcius

Discussion in 'iMac' started by Sir Loin Steak, Jul 18, 2013.

  1. Sir Loin Steak macrumors 6502

    Sir Loin Steak

    Feb 2, 2009
    And for the first time since 2009 the fans are running!

    Ambient is 29 C.

    Should I be concerned? Because I am.

    Advise, anyone?

    Going to log off and switch off for a while.

    Thanks folks.
  2. Intell macrumors P6


    Jan 24, 2010
    Those temperatures are normal. There's nothing to be concerned with. The fans in every iMac that's had them are always running.
  3. SpeedFleX macrumors 6502

    Apr 22, 2009
    I am converting videos and one of my cores is 97c^^And it still working so don't worry
  4. mzeb macrumors regular


    Jan 30, 2007
    Totally Cool

    Yeah, this is not a big deal. You're well within tolerances for your proc. Rule of thumb: if the temperature stabilizes below 100C you're just fine. If you see a temperature continually creep up beyond 100C that's a little more worrisome. Finally, there's a temperature related shutoff in your Mac that will trigger if your Mac gets too hot. You should never hit it but your Mac will save itself if you do. If you DO hit that point take your Mac in for service asap.
  5. GGJstudios macrumors Westmere


    May 16, 2008
    If you're not already doing so, use iStat Pro (free) or iStat Menus ($16) to get accurate readings of your temps, fan speeds, etc., rather than relying on your sense of touch or sound. A forum member has posted a copy of iStat Pro that has been "tweaked" to enhance compatibility with Mountain Lion. You can download it here.
    The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source: Intel)
    Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.
    It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch.
    Your fans are always on when your Mac is on, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis). iMacs have 3 fans with minimum speeds in the 800-1200 range. They will spin faster as needed to keep temps at a safe level. If your fans are spinning up without increased heat, try resetting the SMC. (PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)
    The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best. For Flash-related issues:

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