Game crashing my pc

Hello,

I don’t know if there is already a post about this problem or not. 
After a random number of games, it can be the first one or the 5th, my game freezes and my pc shuts down. After restarting I always check if there is an error but nothing, no error codes. It only happens in Apex Legends, never on other games. The PC shuts down completely, not a reboot. It’s also not happening to a specific temperature of my CPU or GPU.

CPU: Ryzen 7 5700G
GPU: RTX 3060Ti
Ram: 16Go
Motherboard: Asus B550M-II WiFi

Storage: SSD

Power supply: be quiet! Purepower 12M 750W