PC Freeze, crashes and random shutdown

[u/CurrencyFrequent3192]

I have a issue that my pc randomly freezes or mostly it turns off like I'd cut power off, sometimes 2-3 times a day, somedays 0, everyday I'm playing counter strike and deadlock, Most of the time crash happens when I'm connecting or ending match idk if is it related with anything or random. I have tried lowering my wattage to 140W on cpu that is i7 14700KF and GPU RX 7800 XT -10% wattage. PSU is 750W be quiet 12M. I have tried many thing and nothing working so far.