Author Topic: Gigabyte GTX 970 G1 graphics card - liquid damage, fried driver and MOSFET  (Read 2485 times)

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Offline KomajsterTopic starter

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  • Posts: 15
  • Country: pl
Hello.
I've got a Gigabyte GV-970G1 GAMING-4GD graphics card, from what I know it was damaged by some sort of conductive cooling liquid (water?) from the back side of the PCB, it had a fried driver on one of the power phases and one MOSFET that has welded itself to the board. I was able to remove a short inside the PCB between +12V and ground layer and the card somewhat works on leftover five phases, but shuts down under load. I think I will be able to solder a new MOSFET after isolating the inner PCB layer with solder mask, but this card has some strange drivers that I can't really find any information on, they are just marked as "AZJ", did anyone seen those and know their full part number or replacement?

And the top side of the PCB where the burned MOSFET was:
« Last Edit: May 30, 2019, 10:29:22 am by Komajster »
 

Offline KomajsterTopic starter

  • Contributor
  • Posts: 15
  • Country: pl
Found it, its NCP5901B https://www.onsemi.com/pub/Collateral/NCP5901B-D.PDF, the first two characters ("AZ") on the package are device code, the third one ("J") is date code.
 


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