My Macbook Pro's cpu can go from 85C to 50C in a minute, is that even possible?

Discussion in 'MacBook Pro' started by TheJing, Aug 19, 2011.

  1. TheJing macrumors 6502a

    TheJing

    Joined:
    Jun 13, 2011
    Location:
    Somewhere in Europe
    #1
    Simple question. I just find it weird that something can cool itself down like that in a minute.
     
  2. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #2
    Sure with the help with the fan(s). I've seen my MP go from 86c to the 50c in a short span of time when I had the fans chugging away.
     
  3. dsio macrumors regular

    Joined:
    Jun 19, 2011
    Location:
    Australia
    #3
    The TDP for a quad core Sandy Bridge is 45W over an area of about 1 CM². Imagine a 100 Watt lightbulb, how hot that is if you grabbed it with your hand, and how quickly it gets to that temperature. Now imagine if the heat from that was concentrated about 15 times from the surface area of a lightbulb down to the area of CPU die.

    The TDP of the dual core Sandy Bridge chips is 35W. My cheaper soldering iron gets to 300C+ in about 1.5 minutes and is also 35W.

    Its actually remarkable how controllable the temperature is in these laptops.
     
  4. TheJing thread starter macrumors 6502a

    TheJing

    Joined:
    Jun 13, 2011
    Location:
    Somewhere in Europe
    #4
    Yea, after thinking about it it made sense to me. But thanks for explaining it that way.
     

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