Question PC shuts down during heavy gaming or over processing of CPU/Memory ?

Aug 31, 2024
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My PC is one year old with high specs,

Problem: sudden shutdown when heavy gaming , wont start until I plug off power and wait for 5+ minutes . note there is no overheat happenign or something, it used to handle way more heat back when I first bought it.

Also, I upgraded my BIOS and it fixed the flickering that was happening in the game. but PC is still shutting down.

It used to shut down sooner when I had OneDrive installed and it was eating up my memory and over processing. When I removed it, the PC keeps running for longer before shutdown occurs. so basically I am not sure if its my CPU, PSU or the wiring ?

thanks in advance

PSU model: Xigmatek 1100W Gold