PC keep shutting down act 2

Hello,

please could you provide me any helpful info as of why does my PC keep shutting down after 16 hours of gameplay in act 2 3rd map onward?

PC:
win 10 latest update
GPU Radeon RX 7600
CPU AMD ryzen 7600 6 core
32gb ram


thing i tried -

lower graphic
repairing files on steam
used direct client
used these in before start - --noasync --nologo --waitforpreload
tried limiting cores used through task manager

all worked well until act 2

any advice is appreciated. Thanks

Hello,

Just to add to this I have almost identical specs except only 16gb RAM and am experiencing the exact same issue in act 2.

If you end up finding a fix for this let me know but it's very frustrating as it is during the Balbala, the Traitor Boss fight which is already tough enough.