Over Heat when using Thunderbolt

Discussion in 'MacBook Pro' started by lagisibuk, Jul 18, 2013.

  1. lagisibuk macrumors 6502

    Jun 25, 2013
    Always Somewhere

    I have something trouble here.
    I'm using retina 15 (mid 2012). The problem is : when I'm using thunderbolt (TB -> ethernet or TB -> projector), heat for my macbook increase up to 30%++

    Example : when I'm using macbook for office application and using developer tools (dreamweaver, photosop, audio editing), CPU temp is 38 and GPU temp is 48 celcius

    I'm working in room with 22-25 celcius temp

    When i'm using thunderbolt for connectivity (projector or ethernet), CPU is 59 celcius dan GPU 62 celcius.

    my question : it's a normal condition or something wrong with my mac?
    need your advice guys...

    thank you so much
  2. simsaladimbamba

    Nov 28, 2010
  3. maflynn Moderator


    Staff Member

    May 3, 2009
    I find my rMBP sits in the high 40s to low 50s doing normal stuff, surfing, office docs. Doing anything else causes the temps to rise a bit but not horribly. I'd say imo, your temp range isn't horrific.

    I can't answer why you temps increase when a TB device is connected but I have a TB ethernet connection and an external display and the temps I mentioned are with those devices connected
  4. ColdCase macrumors 68030

    Feb 10, 2008
    Your temps rise when connected to the projector probably because you are using more GPU to drive it. This can be significant.

    Dunno about the ethernet, but the FW adapter gets quite warm when there is a drive attached. The rMBP is providing power to the conversion chips within these adapters.
  5. kgeier82 macrumors 65816

    Feb 18, 2008
    Mine sits at about 75c with external display. Its the 650m being used so it heats everything up
  6. lagisibuk thread starter macrumors 6502

    Jun 25, 2013
    Always Somewhere
    Yes, maybe u're right, auto switching GPU. but in case for ethernet without TB, i dont know why

    I will check my activity when using TB, nice idea

    it's a unique case :), I'm not worry for heat, just mention, are this is normal? ;)

    Yes, when using projector maybe.

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