My PC is Shutdown in act 3... Help, how to fix?

I play act 1 and 2 of POE 2 without great problems, but in act 3 the game become unplayabal.

I am have losing a lot of FPS, and the PC is freezing or shutdown.

In combat its unplayabal

the temps are fine, but the PC shutdown anyway


Computer Specs:
AMD Ryzen 7 5800X
32 Gb Ram
RX 7600
Win 11 pro
All drivers are up to date.

I'm playing with the default config

Anyone know how to fix