Is my GPU, PSU or something else entirely the issue with black screen crashes?

[Windows 10]

I currently face the issue of my pc crashing with a black screen and fully shutting down straight away. This consistently happens when I play certain games on my pc such as Fortnite and there is seemingly nothing of importance sparking these crashes. I have updated all of my graphics drivers but this has not solved any of my issues. My pc parts areSU - thermaltake smart series rgb 700wCPU - Ryzen 5 3600GPU - Raedon RX 5700 xtMotherboard - MAG B550M MORTAR WIFI (MS-7C94) 16 GB of ram Any possible solutions or causes for this problem?

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