How hot until fan kicks in?

Discussion in 'MacBook Pro' started by MBX, Apr 23, 2017.

  1. MBX macrumors 68000

    Sep 14, 2006
    Hi there

    I did some video/ after effects stuff on my nTB MBP 13'' and the cpu went nearly 100 celsius and the fan still didn't kick in. The chassis & keyboard were really hot.

    Had to use the app TG Pro to manually start the fans to cool it down.

    How hot does it have to get until the fan kicks in?
  2. ryguy92000 macrumors regular


    Sep 20, 2014
    Salt Lake City, UT
    100c is hot but not that bad. i would get worried around 150c. Make sure the machine is sitting on a flat smooth surface of course. The aluminum will act as a heat sync so it will get hot. Doesn't hurt to use Mac Fan Control to set a minimum, i use it on my 2011 15" mbp to keep the GPU in one piece
  3. Toutou macrumors 6502a


    Jan 6, 2015
    Prague, Czech Republic
    What the.. ?
    100 °C is the T[junction] temperature of the i5-6360U CPU!
    Literally, one degree more and you're out of the Intel approved safe zone.

    The fan should be running at max RPM if the CPU sits anywhere near T[junction].
  4. jerryk macrumors 68040

    Nov 3, 2011
    SF Bay Area
    The fan should be running most of the time, just a slow until max cooling is needed.

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