RTX3080 shorted 12V - How to proceed?

[jacobtc]

I received this RTX3080 with a clear short on one of the 12V inputs. The PSU goes into protection mode, and simply clicks when turned on (My friend told me that).

I tried injecting 1v 3a at the shorted side, but nothing gets hot as these boards are crazy thick. I don't wanna damage the GPU, so I'm currently considering removing the mosfets one by one and checking, but as they are right up against alu caps, it will be risky, as they need crazy heat to remove.

I sadly do not own a ESR meter so my Fluke 189 struggles telling the resistance difference between the mosfets.

I'm all ears, as this is my first GPU repair.

[ktmmotocross]

Re: RTX3080 shorted 12V - How to proceed?

only miliohmmeter can help. otherwise u must remove mosfets until short is gone. if caps is near, than better remove caps first

[DynaxSC]

Re: RTX3080 shorted 12V - How to proceed?

You can try to measure the gates resistance of the mosfets, there is a good chance that the shorted mosfet will also have a short on the gate pin.