Question Random Restarts with no BSOD

[toshiyavg]

CPU: Ryzen 5 5600X
Mobo: Gigabyte B450m
RAM: 16GB DDR4 3200MHz HyperX Fury
Storage: 25gGB M.2 SSD
GPU: Powercolor RX6600
PSU: CoolerMaster 650W 80+ Bronze

Been having this issue for a while where my PC randomly shuts down then powers on while idle, gaming or doing light tasks. Tried OCCT to stress test and the issue persists. Here are the values. Please help.

https://ibb.co/m6PrPC8

 

[Aeacus]

PSU: CoolerMaster 650W 80+ Bronze

PSU make and model (or part number) is? Also, how old the PSU is, and was the PSU bought new or used/refurbished?

 

[Lutfij]

PSU: CoolerMaster 650W 80+ Bronze
Coolermaster is the brand of the unit while 80+ bronze is the advertised 80+ efficiency rating with 650W being it's advertised wattage, what is the model of he unit and how old is it?

BIOS version for your motherboard?

 

[toshiyavg]

The one I bought is used, hence I'm not sure of its age.

Cooler Master MWE White 650W 230Vt

BIOS ver. F65
https://ibb.co/wJZ0G67

 

[Aeacus]

Cooler Master MWE White 650W 230Vt

1. Never cheap out on PSU.
2. Never buy used PSU.

You did both.

MWE White 230V is low/crap quality PSU and since it is used, it is even worse. And very likely, the bane of all your issues.

So, look towards new, good quality PSU.
Good PSUs to go for, are: Seasonic Focus/Vertex/PRIME, Corsair RMx/RMi/HXi/AXi, Super Flower Leadex Gold/Platinum/Titanium.
550W range PSU does fine for your build.