My PC keeps restarting and I don't know why

[TheM8youH8]

My PC keeps restarting when I'm playing games ( sometimes it restarts as soon as I start the game and others only after some hours of gameplay ) I don't know if it is a temp problem ( temps are around 50°C/70°C ) or the psu, I have cleaned everything so I think that dust isnt the problem.

My specs

Motherboard: MSI Gaming A88XM GAMING
CPU: AMD A10-6800k
GPU: MSI R9 280
Mem: G-Skill 8GB Ares Orange 2x 4GB DDR3
PSU: Nox Urano TX 850W

 

[sizzling]

Are these complete loss of power restarts? Temperature issues very rarely cause reboots, usually suffer thermal throttling long before a shut down.

Usually this type of issue is PSU related. I have no idea about the quality of Nox Urano brand, if its a low quality unit the wattage rating will most likely be a lie.