CPU temp reaches 85 C degres!

Discussion in 'MacBook Pro' started by Ichkamo, Jun 15, 2013.

  1. Ichkamo macrumors member


    Jun 13, 2013
    World Wide Web
    Hi all,
    My mac overheats so I dowloaded an app (temperature monitor) to see the temperature of the different components. My CPU often reaches craizy temperatures like 85 Celcius (185F) or more!!! I'm starting to worry when I see websites that indicate a 70C maximum heat!! Does anyone out there has similar results? Any suggestions or tips are welcome.
    Thanks :apple:
  2. GGJstudios macrumors Westmere


    May 16, 2008
    Your temps are quite normal and safe for heavy workloads.

    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:
  3. Interstella5555 macrumors 603


    Jun 30, 2008
    Those are remarkably low if that's the top temp your getting for usage.
  4. Laco macrumors 6502

    Apr 23, 2008
    As others have said your laptop is not overheating. Unless your computer is shutting itself off because it is too hot do not worry about it.
  5. duervo macrumors 68020


    Feb 5, 2011
    Ignore the load temps for the most part. You should be focusing on the idle core temps, and how they compare to the proximity and heatsink temps. If there's a fairly large difference after it's been idle for a long time (there shouldn't be a huge diff), then it points to a possible issue. If they don't, then try to not to worry so much as like others said, it's normal.
  6. Doward macrumors 6502a

    Feb 21, 2013
    The MBP's cooling system is designed to run ~90C when under FULL CONSTANT load.

    Properly running, your fans shouldn't even kick up to high until you get up over 95C or so.

    As you can see, the temps will temporarily 'spike' when hit with a full load, but quickly stabilize to ~90C.

    If you're interested to know if your system is thermally throttling itself, download the Intel Power Gadget here: Intel Power Gadget and run it.

    Then, put your system under a FULL HEAVY LOAD. Use Prime95, or load up FCPX and do a 1080p render, re-encode with handbrake, load up a game, whatever it is that you do and consider your heaviest use of your Macbook Pro.

    The Intel Power Gadget will make it very obvious if you start throttling - if your CPU speed ever goes below whatever the stated speed is, then you are throttling.

    As an example, the 2.5Ghz Core i7 in my 17" MBP never drops below 2.8Ghz under full load. Generally it hovers around 3.2Ghz under full load, so throttling is no issue here ;)

    Also, the maximum fan speed on my Macbook Pro is 6200rpm. I have never seen over 5500 rpm post-lapping.

Share This Page