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  1. #1


    Member Since
    Jan 04, 2010
    Posts
    1
    Smcfancontrol help
    Hey all.

    i recently installed smcfancontrol 2.2.2 on my new macbook pro 15.4" 2.53ghz 4gb ram 256 vram.

    my temps are running at what i think is good (approx 40C) but the thing is that when i open up preferences it shows that i only have a leftside fan running at 2000rpm (lowest) default.

    is this normal?
    shouldnt my system be running 2 fans?
    shouldnt they be running at 1800rpm by default?
    what is an ideal rpm for something runnign at approx 70C?

    any help would be appreciated.
    cheers.

  2. #2

    McBie's Avatar
    Member Since
    Apr 26, 2008
    Location
    Belgium
    Posts
    2,834
    Specs:
    2013 MBA 13" - OS X 10.11.latest
    Mate,
    Do a quick search on this forum and you will find numerous threads on " fans "
    Do yourself a favor and remove SMCFancontrol .... there is no need to second guess the capabilities of the Apple engineers who designed your MBP.
    If things get too hot, your MBP will shut itself down.
    Fans will rev up as and when required.

    Stop worrying and enjoy ....

    Cheers ... McBie
    A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila.
    The bitterness of poor quality remains long after the sweetness of low price is forgotten.

  3. #3


    Member Since
    Aug 28, 2009
    Posts
    147
    The fans are variable speed - there is no "default" as far as I know.
    Personally, I set smcFanControl to the lowest setting (1000) and forget it. I set it to autostart so it shows me temp & fan speed on the task bar.

    If it is only showing one fan, then there is only one fan. If it shows 2 fans, and one has 0-rpm, then you should be worried.

  4. #4


    Member Since
    Aug 28, 2009
    Posts
    147
    Quote Originally Posted by McBie View Post
    Mate,
    Do a quick search on this forum and you will find numerous threads on " fans "
    Do yourself a favor and remove SMCFancontrol .... there is no need to second guess the capabilities of the Apple engineers who designed your MBP.
    If things get too hot, your MBP will shut itself down.
    Fans will rev up as and when required.

    Stop worrying and enjoy ....

    Cheers ... McBie
    I disagree.
    I use smcFanControl because the infinitely wise Apple Engineers forgot to add a fan failure warning or a control panel item with temp readout.

    There is no way to know that fan #1 has failed until fan #2 dies and THEN the mac starts shutting down.

    BTW - The panic shutdown of a system due to an over temp situation is the worst thing you could EVER do. You have overstressed every component of your system by the time the panic shutdown occurs - not to mention the lost data and open files that are left on the disk. If you get to the point that your system panics and shuts off, you can easily wind up with a bigger mess than a dead fan.

    While I agree that messing with fan speed is a waste of time (but harmless), the benefits of the temp & fan speed read outs are priceless.

  5. #5

    Collin Bl's Avatar
    Member Since
    Apr 07, 2009
    Location
    Napier NZ
    Posts
    3,298
    Specs:
    27 iMac i5, MBP 13 & iMac 20, 2TB dual TC, AppleTV, iPh4S
    Another choice is to install iStat Pro so one can check fans speeds when needed.


    Click for full size

  6. #6


    Member Since
    Aug 28, 2009
    Posts
    147
    Quote Originally Posted by Collin Bl View Post
    Another choice is to install iStat Pro so one can check fans speeds when needed.


    Click for full size
    I installed it iStat. Wow. That is TRUELY a scary amount of information.

    But I'll stick with smcFanControl in autostart mode. It does something very basic and sits right on the task bar.

  7. #7

    cwa107's Avatar
    Member Since
    Dec 20, 2006
    Location
    Lake Mary, Florida
    Posts
    26,939
    Specs:
    15" MBP, Core i7/2GHz, 8GB RAM, 480GB Crucial M500 SSD
    Try iStat menus, even better.
    Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!

    https://youtu.be/KHZ8ek-6ccc

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