SMCFanControl?

Discussion in 'MacBook Pro' started by lewismayell, Jun 3, 2013.

  1. lewismayell macrumors 6502a

    Joined:
    Mar 24, 2013
    Location:
    South West England
    #1
    My MacBook has started to run hot while doing normal tasks, and has especially started heating up while I'm working in Ableton or Logic, that I can understand. But when it does start to get hot, should my fans not automatically start spinning faster? I mean sometimes it gets to 70+ degrees and the fans are still spinning at 2000 rpm, is the reason they aren't speeding up because of FanControl or do they not do it automatically?
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    70C is not hot at all.

    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.

    Learn about the fans in your Mac
    Apple Portables: Operating temperature

    For Flash-related issues:
     
  3. skippymac macrumors 6502a

    skippymac

    Joined:
    Jun 9, 2010
    Location:
    Hampshire, UK
    #3
    My fans stay at 2000rpm until about 75+ degrees. 80 is getting a bit warm and at 85-90+ you probably ought to leave it to cool down a bit (and/or turn the fans up to max if you want).
     
  4. lewismayell thread starter macrumors 6502a

    Joined:
    Mar 24, 2013
    Location:
    South West England
    #4
    Oh, thank god, I thought it was running quite hot, I don't have to worry now.

    Will this mean though that I still have to manually select for the fans to spin at a faster rpm or when it gets too hot FanControl will do it for me?

    ----------

    .
     
  5. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #5
    You don't even need smcFanControl at all. Your Mac will automatically manage temps and fan speeds without the need for 3rd party apps.

    You don't need to let it cool down, even at those temps. Read my first post. Such temps are perfectly safe, and well within the normal operating range.
     
  6. lewismayell thread starter macrumors 6502a

    Joined:
    Mar 24, 2013
    Location:
    South West England
    #6
    I just deleted the application, I was probably just worrying too much before, thanks for the help:)
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    If you want to make sure all traces of the app are gone, the most effective method for complete app removal is manual deletion:
     
  8. makinao macrumors regular

    Joined:
    Dec 27, 2009
    #8
    I have SMC on my MacBooks, but I only use them to monitor processor temps because you can't rely on the case temp. I like that it just sits there compact and unobtrusive in the the menu bar. There have been a few occasions where either the temps go through the roof (90+C) or the fans go haywire. In most cases its either a naughty flash pop-under, or the finder going nuts.
     
  9. yliu macrumors regular

    Joined:
    Jun 15, 2009
    #9
    My 15' rMBP runs at 90-100 Celsius while playing games, this is near the limit of the before it's supposed to auto shutdown. The problem is that the fans are only spinning at around 4000rpm according to iStat...

    Is it normal that my mac is letting itself heat up so much?
     
  10. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #10
    Read the 2nd post of this thread. Yes, it's normal.
     

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