Haswell @ 10W TDP - will it enable fanless ultrabooks?

Discussion in 'CPUs and Overclocking' started by Fjodor2001, Nov 9, 2012.

  1. Fjodor2001

    Fjodor2001 Diamond Member

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    So Haswell will be available in a 10W TDP version. Will that enable fanless ultrabooks?

    What do you think?
     
  2. laputan machine

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    I would doubt it. I had a laptop with a SU2700 which is rated at 10W TDP. Granted, this was a toshiba satellitte with plastic case, but it most definitely needed a fan running to keep from overheating.
     
  3. Fjodor2001

    Fjodor2001 Diamond Member

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    Some thoughts:

    * Did that laptop have an SSD or HDD? The latter produces more heat.
    * Does the SU2700 have an IGP? If not, it would require an external GFX chip adding to the total system TDP. But for Haswell the IGP is included in the 10W TDP.
    * The chipset used for Haswell will have lower TDP.
    * There is now DDR3L memory available which has lower power consumption.
     
    #3 Fjodor2001, Nov 9, 2012
    Last edited: Nov 9, 2012
  4. T_Yamamoto

    T_Yamamoto Lifer

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    I have my doubts. Its best if you have at least ONE fan.
     
  5. laputan machine

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    I have no doubt that it'd run cooler than my old laptop, but I still doubt it will be fanless, especially when you consider they have to build the laptop to be used in much warmer countries as well (I'm in Norway.
    HDD and some intel gma solution btw.
     
  6. BrightCandle

    BrightCandle Diamond Member

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    5W is about the limit for air cooling given enough circulation. A laptop is normally very constrained so even once you get down to possible air cooling territory you will need access for air to naturally circulate a bit.
     
  7. Fjodor2001

    Fjodor2001 Diamond Member

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    But what if you have a metal chassis (which is common for Ultrabooks), then that can act as a heat sink too?
     
  8. dma0991

    dma0991 Platinum Member

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    At the risk of burning your lap? Bad design choice there. It could run fanless at the expense of a bigger heatsink which adds weight and size(thickness).
     
  9. Insert_Nickname

    Insert_Nickname Platinum Member

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    The SU2700 is Core 2-based, so it doesn't have an IGP. The GS45 chipset is rated at 12W TDP, plus the ICH9-M is 2.5W. So overall your SU2700 platform is rated at 24.5W TDP. No wonder it needs a fan... :D
     
  10. cytg111

    cytg111 Platinum Member

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    fans == evil .. I'd like one of those fanless haswells :)
     
  11. Fox5

    Fox5 Diamond Member

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    You'll definitely need a fan in any laptop processor above a 5W TDP.

    Most of your tablet SOCs come in at around 2.5W, and rarely reach that peak.
     
  12. Ayah

    Ayah Platinum Member

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    Would probably need 2-4W processors and a chassis capable of high thermal conductivity. I'd suspect you'd still need some fins or other clever area-enhancing exterior features to cover a wide-range of environmental temperatures.
     
  13. cytg111

    cytg111 Platinum Member

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    ...... we sure we cant get one of the brilliant engineers to fit a megahelm in that tablet?
     
  14. firewolfsm

    firewolfsm Golden Member

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    I've always wanted to see the chassis of a laptop used as a good heatsink. Fins on the sides and bottom and pipes going in two or four directions along the chassis. Considering we cool well over 30W fanless in desktops, sometimes more than 60, this should be feasible.
     
  15. Fox5

    Fox5 Diamond Member

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    A laptop needs to be touched....

    And a laptop is often placed on surfaces that aren't good for heat dissipation. Like a lap or a carpet.
     
  16. nforce4max

    nforce4max Member

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    10w is to much to be fanless in a notebook design and thermal buildup will shorten life span very quickly as well being very uncomfortable experience for the user.
     
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