Question PC turning off while gaming

Aug 22, 2019
When I first built my pc about 2 months ago, it had a little problem with turning off every once in a while, not too often, but at least once every 2-3 days. I somehow sorted this, can’t remember what I done, but I changed something in the bios and it sorted it. It was perfect for 6 weeks, now it’s back to turning off randomly and I can’t work out what’s wrong.

My temps seem to be fine and CPU/GPU usage seem to be okay also.

My build

Sapphire Pulse Vega 56

Ryzen 5 2600

Corsair VS V650M 650w bronze modular

MSI B450 gaming pro

Any ideas what could be wrong? My cable management is messy, would that be a problem? I also have a dusty room, but I tend to clean it out once a week, not sure if that could be an issue.