What happens when it starts to get Hot with no fan?

Discussion in 'MacBook' started by Stayfly2407, Mar 10, 2015.

  1. Stayfly2407 macrumors 6502

    Stayfly2407

    Joined:
    Apr 1, 2011
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    VA
    #1
    Fanless, nice. Quiet, nice.... So how does this thing cool down after running several apps for hours??
     
  2. Steve121178 macrumors 68040

    Steve121178

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    Apr 13, 2010
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    Bedfordshire, UK
    #2
    The heat that is generated will probably dissipate through the metal chassis. The CPU physically can't get roasting hot so it's not an issue.
     
  3. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #3
    The point is that it's designed to generate less heat, so even running for several hours, it won't get as hot as other Macs.
     
  4. Stayfly2407 thread starter macrumors 6502

    Stayfly2407

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    VA
  5. Serban Suspended

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    Jan 8, 2013
    #5
    even when the cpu is at max 2.4 ghz the heat is vents aways through the metal chassis
     
  6. Mrbobb macrumors 601

    Joined:
    Aug 27, 2012
    #6
    It slows down to like 400mhz.

    Kidding I don't know the precise answer but all Intels throttle down as needed. Suffice to say it will never get hot enough to be unsafe, that you can depend on.
     
  7. Serban Suspended

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    Jan 8, 2013
    #7
    It can;t be slowed down to 400mhz....because the lowest freq is 1100mhz :D
     
  8. Gav2k macrumors G3

    Gav2k

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    Jul 24, 2009
    #8

    It can down clock to 600mhz
     
  9. Serban Suspended

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    Jan 8, 2013
    #9
    you are kidding right? :D
    it operates between 1100mhz and 2.4
    That is hardware can't do below or higher than that
     
  10. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #10
    Intel® Core™ M-5Y51 Processor (4M Cache, up to 2.60 GHz)
     
  11. Sym0 macrumors 6502

    Sym0

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    Jun 6, 2013
    #11
    Was gonna say all CPUs can run super slow when idle.
     
  12. Serban Suspended

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    Jan 8, 2013
    #12
    1.1 ghz turbo boost up to 2.4ghz , not to 2.6 ghz. Tha is the 1.2 CPU
     
  13. Queen6 macrumors 603

    Queen6

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    #13
    It`s going to throttle and that`s the major concern for many of us. Personally the benefit of a fan-less system appeals, equally this is not a computer your going to be wanting to do a lot of "Handbraking" on :)

    Q-6
     
  14. Gav2k macrumors G3

    Gav2k

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    Jul 24, 2009
    #14
    Both the 1.1 and 1.2 can clock down to 600Mhz
     
  15. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #15
    Configurable TDP-down Frequency is the same for both: 600MHz

    Intel® Core™ M Processor
    Screen Shot 2015-03-10 at 4.47.32 PM.PNG
     
  16. actuallyinaus macrumors regular

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    Feb 13, 2013
    #16
    it will underclock to stay below a given TDP

    so, yes it can boostclock to 2.whatever but it won't stay there for very long
     
  17. Skika macrumors 68030

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    Mar 11, 2009
  18. mtneer macrumors 68020

    mtneer

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    Sep 15, 2012
    #18
    The CPU will throttle and eventually encounter a thermal shutdown. The 101 task for Apple's engineers is to ensure that does not happen.
     
  19. thewusman macrumors regular

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    Aug 8, 2013
    #19
    Will be interesting to see what happens in more CPU cycle intensive applications.

    On my MBA 11" and Surface Pro 3, both with i5, Lightroom causes the fan to kick in. The performance is quite good though, and the fan keeps the temps optimal to avoid thermal throttling.

    If the new MacBook downclocks to 600Mhz under the same circumstances to maintain the low TDP, photo editing could become a terrible experience, if not downright hellish.

    Waiting for the first reviews with much anticipation.
     
  20. MarvinHC macrumors 6502a

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    Jan 9, 2014
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    Shanghai, PRC
    #20
    Tell this to my iPhone 6 which occasionally gets burning hot
     
  21. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #21
    Your iPhone doesn't get as hot as Macs can under extreme load, and like Macs, your iPhone will shut down before it exceeds safe operating temps.
     
  22. MarvinHC macrumors 6502a

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    Jan 9, 2014
    Location:
    Shanghai, PRC
    #22
    My point is that I don't believe in a fanless laptop. I rather expect fans to appear in mobile phones some day if they continue to increase their processing power at the current pace.
     
  23. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #23
    Millions of mobile phones operate without issue for years without needing fans, whether you believe in them or not. As technology advances result in processing power increases over the years, so does thermal efficiency.
     
  24. The Phazer macrumors 68030

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    Oct 31, 2007
    Location:
    London, UK
    #24
    It's a bit of a simplification to suggest they happen at the same rate however, and we are definitely hitting genuine physics problems with thermal efficiency improvements at this point.
     
  25. zhenya macrumors 603

    zhenya

    Joined:
    Jan 6, 2005
    #25
    The core-m in the new MacBook runs on 5w of power, compared to the 15w chips in the MacBook Air. This is more in line with the power consumption of the chip in the iPad.

    Fans aren't necessary.
     

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