ATTENTION! Potential Flaw with ALL XPS 15 9560 - GPU Throttling!

Discussion in 'Dell XPS and Studio XPS' started by Pete Light, Mar 17, 2017.

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  1. Pete Light

    Pete Light Notebook Deity

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    Can someone circle all the VRMs for me on iunlocks diagram? There are loads on small "black ones" as well as larger and some of the small ones have the biggest temps! ...

    Thanks!
     
  2. Philaphlous

    Philaphlous Notebook Evangelist

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  3. Pete Light

    Pete Light Notebook Deity

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    Hey guys, btw it seems that this GPU throttle also effects the CPU!!

    Check below, once the GPU throttle occurred the CPU also throttled from a steady 3.4GHz to 2.7ish!

    [​IMG]
     
  4. kojack

    kojack Notebook Virtuoso

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    Do Alienware laptops do this, or just the xps models?
     
  5. Pete Light

    Pete Light Notebook Deity

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    Just the XPS for the GPU (and subsequent CPU) throttling. Alienware has has just CPU throttling issues stock paste if you overclock

    Sent from my SM-G935F using Tapatalk
     
  6. _sem_

    _sem_ Notebook Deity

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    I guess what you're seeing is not particular news, except perhaps that even Conductonaut can't do miracles.
    Surely you should try padding the VRMs to the chassis, and perhaps using a laptop cooler to get the heat away.
    I'd also try removing that part of the tape which seals the gap between the fan and the heatpipe, leaving just that between the heatpipe and the case edge. I assume a bit of leakage of the cooling air towards the VRM area might be helpful.
     
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  7. pressing

    pressing Notebook Deity

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    Pete---

    I am suggesting you try weak fluffy thermal pads on only 3 GPU chokes to focus maximum impact on the trouble area only (and ignore less problematic areas).

    The 3 GPU chokes are the tall silver squares clustered in a sidewards "L" shape with temps marked 67*, 67* and 78* in iunlock's photo below.

    Note the case bottom will flex in a bit and the components are delicately attached to the motherboard, so you don't want tight fitting or dense thermal pads...

     
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  8. Pete Light

    Pete Light Notebook Deity

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    Cheers buddy will do. I've got loads of 1mm thick Arctic 6W/mK. Should do the trick?

    Sent from my SM-G935F using Tapatalk
     
  9. pressing

    pressing Notebook Deity

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    As long as the pads are fluffy and the case bottom does not compress them much, I think they should be fine.

    I tried 17 W/mk pads on all 6 chokes of my 9550 and they superheated the case bottom and keyboard in less than 5 minutes. The keyboard was uncomfortable.

    *** GoNz0 suggested that a hot case bottom will pre-heat air to fan intakes, killing radiator efficiency. I found that to be true based on CPU and GPU readings.

    The key is a delicate balance. Transferring just a enough heat to the case bottom to prevent the GPU vrm section from exceeding ~77*C. But not enough heat to saturate the case bottom...
     
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  10. Pete Light

    Pete Light Notebook Deity

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    Spot on makes perfect sense will try that. I'd be happy with a max VRM temp of 77 under load!

    Sent from my SM-G935F using Tapatalk
     
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