[CPU + GPU Temperatures + Benchmarks] - XPS 15 [9560] Kaby Lake

Discussion in 'Dell XPS and Studio XPS' started by iunlock, Mar 10, 2017.

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Which configuration do you have? (Select 3x)

  1. i7-7700HQ

    90.1%
  2. i5-7300HQ

    9.0%
  3. i3-7100H

    0 vote(s)
    0.0%
  4. 4K UHD

    53.2%
  5. 1080p FHD

    34.2%
  6. 56WHr

    12.6%
  7. 97WHr

    73.0%
Multiple votes are allowed.
  1. abujafar

    abujafar Notebook Consultant

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    How exactly did you guys figure out that there was a throttling happening because of the VRM temp?
    Where and how does it appear?
    Is it flagged somewhere in the logs of XTU or HWINFO 64 as VRM throttling?

    I want to be able to distinguish Temp Throttling, Power Limit Throttling, and VRM Throttling.
     
  2. pressing

    pressing Notebook Deity

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    @GoNz0 and several of the other guys here nailed down the thermal issues with the 9550 & 9560. Aida64 mislabeled that temp sensor when the 9550 was released so it was a bit of extra sluthing. GonZ0 is a professional laptop engineer and a lot of the people here are engineers or extreme overclockers.

    The VRM throttling is misleading as power limit flag; best we can tell, it appears Dell programmed flag when Ambient sensor (1) goes to about 77C.

    The issue here is that the XPS has very little space for the VRM components and for coolng the VRM. If Dell had space for better cooling or more phases, the VRM would run more power and cooler. As the mosfets get inefficient at high temps, things start to spiral out of control; getting hotter but producing less power. So Dell programmed the low 77C temp gate for safety. So all the VRM mods you see are principally to work around Dell's 77C temp gate (the mosfets produce more power at low temps as added benefit).

    Not sure if that is an issue on the 9570; the VRM looks similar but I would guess mosfet technology has moved forward over the past 4 years...
     
    abujafar and _sem_ like this.
  3. custom90gt

    custom90gt Dellerator Moderator

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    My guess is that it's moved forward as much as the cooling that they used in the 9570 has... I bet the only reason they don't have VRM throttling is because there doesn't seem to be a huge enthusiast following where people are taking logs to see why their cpu/gpu is slowing down.
     
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  4. BC3

    BC3 Newbie

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    How similar is the 9560 to the 9550? and could i do this on a 9550?
     
  5. custom90gt

    custom90gt Dellerator Moderator

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    Virtually identical if not identical. Yes you can.
     
  6. BC3

    BC3 Newbie

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    thank you
     
  7. abujafar

    abujafar Notebook Consultant

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    Trying to exploit your knowledge guys for the new 9570.

    1) What is the exact clearance between the mosfets and backplate?
    2) What is the exact clearance between the chokes and backplate?

    Did the chokes need cooling as well in the 9560?

    I have seen @Eason mod staking 3 1.5mm pads between mosfets and the backplate. That implies that clearance at most 4.5mm.

    Also, isn't it a bad thing in general to stack thermal pads?
     
    Last edited: Jun 1, 2018
  8. Bilal Fouzi

    Bilal Fouzi Newbie

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    hi @iunlock

    I just bought an xps 9570 and it has the EXACT same issue as your xps 9560 had. The Ambient 1 shoots upto 103, sometimes the laptop shuts down when gaming, im assuming its because the FET reaches its ultimate point above 110 or something. I plan on doing your mod, could you please tell me the size of those aluminum heat sinks you used?

    Dont want to order something too big or too small and waste money

    Cheers
     
  9. custom90gt

    custom90gt Dellerator Moderator

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  10. _sem_

    _sem_ Notebook Evangelist

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    In fact this was not typically going on with the 9560, it would instead start downthrottling the clocks with Ambient 1 in the seventies. But lately there have been reports of freezes and restarts also with the older versions, maybe Intel DPTF is reconfigured or fails?
     
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