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    920XM temperature difference

    Discussion in 'Alienware M15x' started by Raidriar, May 7, 2017.

  1. Raidriar

    Raidriar ლ(ಠ益ಠლ)

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    I just put in the 7.7CFM fan with some liquid ultra TIM, and ran a load test at 3.5ghz. the first 6 of the 8 cores top out at 86F and the last 2 are up at 100 degrees.....wtf? What could be the cause of that?
     
    Raidriar, May 7, 2017
    #1
  2. don_svetlio

    don_svetlio In the Pipe, Five by Five.

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    8 cores?! Huh?
     
    don_svetlio, May 7, 2017
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  3. Raidriar

    Raidriar ლ(ಠ益ಠლ)

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    4 physical cores + hyperthreading = 8 logical cores
     
    Raidriar, May 7, 2017
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  4. don_svetlio

    don_svetlio In the Pipe, Five by Five.

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    That's not really how it works - a hyper-thread is not a exactly a core, physical or logical. It's essentially a way of making a single core work about 20-30% more efficiently by constantly keeping it fed and reducing idle time. As a result, you have more heat output. As for thermal variation - if those are *F then that's perfectly normal. If it's in *C - you probably haven't applied the paste or heatsink evenly/properly.
     
    don_svetlio, May 7, 2017
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  5. vr_fox

    vr_fox Notebook Guru

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    I have a 940xm ES and 1 core is always 5 to 8 Celsius hotter
     
    vr_fox, May 31, 2017
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  6. STiHiaL

    STiHiaL Notebook Consultant

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    Don't think that all is OK if temperatures are in Celsius and all cores really loaded equally.

    [​IMG] [​IMG]

    Fan itself didn't affect personal core temperatures, just overall temperature across CPU.
     
    STiHiaL, May 31, 2017
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  7. vr_fox

    vr_fox Notebook Guru

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    There is documentation that on ES and QS chips cores are not necessarily even
     
    vr_fox, May 31, 2017
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  8. STiHiaL

    STiHiaL Notebook Consultant

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    BTW, r there any noticeable difference in fan performance between 5.5 and 7.7 cfm?
    P.S. Mine one is SLBLW.
     
    Last edited: May 31, 2017
    STiHiaL, May 31, 2017
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  9. vr_fox

    vr_fox Notebook Guru

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    Also the heatsink could be bent and not making good contact, or the cpu could be not exactly flat
     
    vr_fox, May 31, 2017
    #9