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    Anybody with a Broadwell-U CPU getting what I'm getting?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by Game7a1, Jan 23, 2015.

  1. Game7a1

    Game7a1 ?

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    Screenshot (3).png
    I'm talking about the wattage used by the CPU. It's not 15w, and while I do know that the TPD isn't a hard limit, I'm not so sure if it's supposed to go over the limit.
    I'm looking at my current HWMonitor, and the max column reports that almost 17w has been used. Is it that the CPU actually is going overboard or is HWMonitor misreading something?
    EDIT: Well, I somewhat concluded that Alienware decided to not limit the ULT CPUs or limit them very softly. But still, I would like the see if some other laptop can get the same results.
     
    Last edited: Jan 25, 2015
    Game7a1, Jan 23, 2015
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  2. D2 Ultima

    D2 Ultima Livestreaming Master

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    You're lucky. Most CPUs in that format are even extra limited by the boards. At least yours is slightly able to stretch its legs.
     
    D2 Ultima, Jan 23, 2015
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  3. DackEW

    DackEW Notebook Consultant

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    I think we will need to open a new topic, where we can discuss how badly limited is the Brodwell U in the mentioned laptops. Than the first post should contain a table, which would be easliy reviewable for evey visitors, they could easily decide which of the laptop worth to buy.
     
    DackEW, Jan 24, 2015
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  4. Dwarner

    Dwarner Newbie

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    I highly doubt the results from software measurements. They can be inaccurate. Also indicated high values can be valid for rather short periods. Which ever case it doesnt really matter. The CPUs are all about the same if the cooling is sufficient.
     
    Dwarner, Jan 24, 2015
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  5. DackEW

    DackEW Notebook Consultant

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    For example lets run prime95 for half hour and check CPU frequency at the end. That cpu speed would we write into tables for each laptop.
     
    DackEW, Jan 24, 2015
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  6. tassadar898

    tassadar898 Notebook Evangelist

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    That is because it is turboboosting and allowed to go over the 15W for X number of seconds. It depends on the manufacturer what the TDP limit for turbo boosting and the duration. My dell xps 13 can go up to 19W for about 28 seconds before it throttles it back down to 15W.
     
    tassadar898, Jan 25, 2015
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  7. Game7a1

    Game7a1 ?

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    Well I know it is turbo boosting, but when turbo boosting, it will usually go about a watt or 2 beyond the TPD.
     
    Game7a1, Jan 25, 2015
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  8. DackEW

    DackEW Notebook Consultant

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    The first Broadwell U CPU tests are out, but on GPU front HD5500 not impressive at all, most of the times below an old Amd Trinity, barely better than a HD4000. On the orher side at CPU front showing nice improvement, 10% faster compared to similar haswell.
     
    DackEW, Jan 29, 2015
    #8