AMD Ryzen 5950X PC Build Issue

[AuditoryChemist]

Having an issue with a new PC build. After I power it on it runs through boot sequence and runs through all the LED indicators on motherboard, then within about 5 seconds of launching BIOS or start g Windows 11 USB install it powers off. Then if I try to power it back on it dies sooner, only. Making it thru 1 or 3 of the boot sequence leds on the motherboard. 

If I turn off power supply and let power drain and then powr back on it will make it thru boot sequence leds, begin to try to install windows again and does a few seconds later. I've checked all cable contacts, I have tried swapping out ram from another machine I have, tried using a different video card, moved video card to another pcie slot. Completely baffled at this point. Possibly a bad power supply or cpu? Thanks in advance for any help! Components listed below... 

AMD Ryzen 7 5950X
Corsair iCUE H100i Elite Capellix XT AIO cooler
ASUS X570-Plus (Wi-Fi) (and has updated bios for 5000 series chips)
Corsair Vengeance Pro RGB 64GB RAM
Samsung 980 evo pro Nvme m.2 2TB w/ heatsink
Samsung 980 evo pro nvme m.2 2TB 
ASUS TUF gaming 850w power supply 
Corsair iCUE 4000D RGB mid-tower case

[191x7]

Does it power off while in the Bios?

[SpookyCitrus]

I'd check your temps in bios, in the small amount of time you are in bios check what your CPU temps are, I had a PC come in just last week that had this exact issue and it was a bad cooler and the CPU was overheating. 

 

I'd say it's either overtemperature shutdowns or a bad PSU, I'd look into overheating first as it could be a simple fix.