P870KM1 SLI "things".

Discussion in 'Sager and Clevo' started by artpra, Sep 20, 2019.

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  1. cope123abc

    cope123abc Notebook Evangelist

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    Amen to that
     
  2. artpra

    artpra Notebook Consultant

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    I've added additional 0,5 mm shims for both GPU to definitely close any gaps there (so 1 mm in total) and... temps are exactly the same.
    I`m out of ideas gentlemen.
     
  3. Meaker@Sager

    Meaker@Sager Company Representative

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    Could be the vapor chamber is not operating properly.
     
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  4. artpra

    artpra Notebook Consultant

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    And how is that possible?
    There is no visible defect on it anywhere (dent, puncture, etc).
     
  5. jc_denton

    jc_denton BGA? What a shame.

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    When you did the tests, was that with max fans fn+1?
     
  6. artpra

    artpra Notebook Consultant

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    Yes, of course - fans were blasting past 4k RPM.
    I'm a blind baby in a foggy forest.
     
  7. cope123abc

    cope123abc Notebook Evangelist

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    It sounds like the vapour chamber is somehow bent and isn't making contact with the chips.


    A good way to troubleshoot is, do the temps shoot VERY fast to 91 when you hit a stress test? @artpra
     
  8. artpra

    artpra Notebook Consultant

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    That would point out a poor contact with die straight away but it`s not happening. If you look at OP there is a graph with temps for both GPU combined.
    It takes about 9 minutes until temps stabilizes at 90C and 91C suggesting a proper (?) contact and slowly reaching thermal capacity.
     
  9. jc_denton

    jc_denton BGA? What a shame.

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    This is indeed very trange. I'd go back to basics. Remove both copper shims and only leave the thinnest thermalpads on. Then testfit the gpu onto the vapor chamber and with a flashlight try and see whether the die contact is proper. Do this outside of the chassis.

    If it is fine, add the thicker thermalpads and see if they cause poor contact.
     
  10. Meaker@Sager

    Meaker@Sager Company Representative

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    Thicker pads will reduce contact, the RAM should be 0.5mm and go from there.
     
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