Path of Exile 2 open and turn off my pc

Hello, I bought the Path of Exile 2 beta, and for a long time the game worked normally, but after about 15 hours of gameplay the game simply turned off my PC, and I couldn't play the game anymore because every time I try to play my computer shuts down.

I've already changed my power supply, video card, RAM, I just didn't change the motherboard because I don't have another available, I formatted the computer, reinstalled drivers and updated the computer

If anyone has any ideas let me know.