Question GTX 1080ti Aorus Blown part of VCORE. How to repair?

Nov 22, 2020
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Hello I am not new to system components but I am new to GPU repair and PCB circuitry. I recently purchased a broken Aorus 1080ti locally for 60 dollars with the intent to fix. I have diagnosed the problem to be a blown module located in the vcore. I dont know exactly if it is a mosfet but I do know that it is manufactured by Alpha & Omega semiconductors (AOZ5036) http://www.aosmd.com/res/data_sheets/AOZ5036QI-01.pdf.

I have already purchased some replacements from Aliexpress (https://www.aliexpress.com/item/4000786926977.html?spm=a2g0s.9042311.0.0.38ef4c4dIoAR5x).

I still don't know if the short was caused from internal problems or if it was purely a PSU issue. I need some help on identifying the cause, and also need help on what I need to replace the module. I have included a link to multiple photos of the module and the rest of the PCB.
View: https://imgur.com/gallery/NEzwbmT


I am eager to answer questions about the cause of the problem, I did get some information from the seller on the event prior to the problem.
 
Reactions: AOverclocking
Nov 24, 2020
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Hello!
I have recently purchased a similar item and done some digging online. Although my DrMOS is a different model it is a AOE6932. Since my graphics card is a EVGA Founders Edition Reference model I have 2 DrMOS per phase. The case with my card and many online is most likely the cause of WATER DAMAGE. This somehow either destroys the DrMOS or the voltage driver. I have measured resistance on my DrMOS first pin and it seems that I'm around the 6 Ohm. I havent yet ordered a replacement DrMOS but I HIGHLY suggest replacing the burned-out MOSFET. That should fix the issue. PLEASE! Let me know if this works as it confirms my hunch!

Edit: Normal D1 pin resistance should be around 10.10-10.30 kOhm. A broken DrMOS has a lower resistance due to short
 
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Reactions: WaylMaster

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