Hello, I have a RX570 Armor from MSI and so far it still does its job in casual conditions, even when furmark and heaven benchmark. But somehow it causes the system to crash when benching with Catzilla. I'm pretty sure the problem is the GPU itself so I took it out and had some measurements. The +MVDD is shorted to ground according to my continuity test. 

I wonder how can that be because from the schematic, I see +MVDD supplies voltage to a lot of components, e.g VRAM, even the GPU core. Can anyone give me some explanations about this and how can I deal with this.

Its a bit hard to find the culprit since I don't have thermal camera, does anyone have some tips to find the component ?

Thank you for your help. Appreciated a lot.