CPU overheating causing shutdown

Mar 9, 2018
1
0
10
System specs:
Ryzen 5 1600x
MSI B350 PC MATE
8GB DDR4 Kingston hyper fury
MSI GTX 970
Corsair CX550M
Coolermaster masterliquid 120 lite
Coolermaster masterbox 5

I just finished building my computer a few days ago and whenever I turn it on it just shuts down a minute or two later. I tried turning it on and going straight to the bios and the temps just go up until about 72-73 degrees before it just shuts down. I don't know what to do and I just want the computer to be usable, so I appreciate any help!