Gigabyte GTX1080 - identifying a dead short on vmem

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  • Prott
    Senior Member
    • May 2022
    • 154
    • Czechia
    #1

    Gigabyte GTX1080 - identifying a dead short on vmem

    Hey!
    I have a problem with Gigabyte Aorus 1080. The card seems fine (expected resistance on vcore, pex, 5v, 1.8v, 12v and reset) except for a dead short on vmem (FBVDD). It's interesting failure mode, cause usually (in my experience) when memory fails it still retains a few ohms - this one is literally a dead short.

    I removed the inductors and tried inject voltage (0.8 V at 6 A) which only seemed to warm up the cables to the card while the card itself didn't show any hotspots.

    Is there any way to narrow down the search for a short? I would prefer not to remove all the memory chips and discover it's a shorted cap.

    Thank you!
    Last edited by Prott; 07-04-2023, 07:56 AM.
    Tags: None
    • Prott
      Senior Member
      • May 2022
      • 154
      • Czechia
      #2
      Re: Gigabyte GTX1080 - identifying a dead short on vmem

      SOLVED: Dead core

      Moral of the story:
      a) No vcore, low res. on vmem -> possibly dead core
      b) Low res. on vmem, nothing gets hot after voltage injection -> dead core

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