P870KM1 1080 SLI issue (possible dead card?)

Discussion in 'Sager and Clevo' started by ascottuk2010, Sep 24, 2019.

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  1. ascottuk2010

    ascottuk2010 Notebook Geek

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    Hi All,

    So i bought a P870KM1 from @DaMafiaGamer which has been superb and what a great guy as a side note. Came with a single 1080 and i always had the intention of going SLI hence i bought the additional PSU and splitter again from @DaMafiaGamer

    I bought an additional 1080 from @Dr. AMK again a top top guy arrived reasonably swiftly considering the holidays

    Before installing i modded the heatsink as per instructions with a pure copper 0.5mm shim and was all good to go, i used 6wmk thermal pads as per instructions also

    Installed and everything was perfect, temps where good, the only issue i had was the slave card from @Dr. AMK seemed to be drawing up to 205w, this subsequently settled down over the next week and both cards where drawing around 180W

    Temps where fantastic, the primary card topped out at 73 degrees and the slave around 78 degrees

    On the weekend the machine failed to post at all,it turned on for a few seconds then off, nothing on the screen just black.

    Below is the troubleshooting i have done

    Removed the slave and the machine posts fine

    Swapped the cards around so the slave is in the master and master in the slave, machine fails to post same behavior as above

    removed both cards, same behavior as above

    put just the slave card in the master slot, same behavior as above

    So essentially i think the slave card is dead, i have no other machine to test it in either unfortunately as my brothers machine died a month ago.

    I am back running with the single 1080 that came with the machine absolutely fine, both the card are exactly the same revision

    Does anyone have any other ideas on what i can do to test or eliminate anything else as i am stumped and left with a rather heavy paperweight after less than a month of use
     
  2. DaMafiaGamer

    DaMafiaGamer Notebook Deity

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    Seems like the slave card has killed itself. Were the thermal pads making good contact on the vrm sides?
     
  3. Dr. AMK

    Dr. AMK Living with Hope

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    I'm sorry for what happened, I assure you that the card was in 100% working condition.
    Is the vBIOS for both is the same?
    The copper 0.5mm shim, if it pushed hard the GPU core it will damage it, for all normal vapor chamber heatsink there is no need for any shims.
    I suggest that you attache some pictures for the card from both sides.
     
  4. ascottuk2010

    ascottuk2010 Notebook Geek

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    Absolutely, nice slight indents from the pressure. As for the copper shim, its exactly the same as the one @DaMafiaGamer has on the other side, if anything it was not making enough contact till i repasted with a slightly thicker TIM (Kryonaut)

    I will post some photos tonight, i had a really good look through a small magnifying glass and it doesnt shoy any circuit breaks, but i mean in all honesty its not that powerful to look through so i could have missed something
     
    Vasudev, DaMafiaGamer and Dr. AMK like this.
  5. Dr. AMK

    Dr. AMK Living with Hope

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    For the card and the VP heatsink as well.
     
  6. ascottuk2010

    ascottuk2010 Notebook Geek

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    IMG_0004.JPG [​IMG][​IMG]

    Hi guys,

    Had more of a play and still the same

    Attached the above


    Sent from my iPhone using Tapatalk
     
  7. Meaker@Sager

    Meaker@Sager Company Representative

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    There is no defined slave card so they can be swapped for testing or either one run I individually.
     
  8. ascottuk2010

    ascottuk2010 Notebook Geek

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    Already done this as above

    Removed, and tested the new card on its own and doesn’t post


    Sent from my iPhone using Tapatalk
     
    DaMafiaGamer likes this.
  9. DaMafiaGamer

    DaMafiaGamer Notebook Deity

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    Whats the mark near the vram chip??
     
  10. ascottuk2010

    ascottuk2010 Notebook Geek

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    Just some left over thermal pad from the old pads that must have been applied, the phobya ones I have a dark grey

    I’m utterly stumped now


    Sent from my iPhone using Tapatalk
     
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