My PC keeps shutting down seemingly randomly while I am playing games, the most common occurrence is on Fortnite when dropping out of the bus, though it has happened on the spawn island once as well as while driving around in Cyberpunk.

No blue screen just an instant cut. The rgb on my GPU stays on for a moment after everything shuts off

Ive done numerous stress tests to try and identify the point of failure with no luck, such as a fresh windows install, CPU and GPU stress tests both together and separate, power draw test via OCCT, ive swapped my PSU out for my old one that had no issues. all drivers are up to date, latest version of the motherboards bios, latest windows updates all installed.

Ryzen 7 5800X (maxing around 80C under full load)

Yeston 6750XT 12GB Vram (maxing around 65C under full load)

16GB (8x2) DDR4 Gskill ripjaws 3200MHz

Corsair RM850e Gold 80+ 850W PSU

MSI B550 Gaming Plus MoBo

SSD 1TB WD Black SN770 (Main drive, windows, games,ect.)

HDD 2TB Seagate Barracuda (Backups of important files)