Question Pc turning off and back on randomly

[psilokamenos]

Hi my pc started to turn off and back on (like reboot) when i play games (league of legends)
there is no blue screen, or crashing sound like brzzzzz or anything just closes and re opens
it closes like you press the button to force shut down the pc from the pc case
Temps from cpu and gpu are normal not over heating
if anyone has an idea of what is faulty or how to find out what is wrong it would help a lot.

specs:
i5 6600k (not overclocked)
rx 580 8gp
ram : 2x 8gb corsair value for money 2133
psu : turbo-x 500w 80+ bronze (not a known brand)
mobo : msi b150m mortar

 

[rgd1101]

get a quality psu

 

[psilokamenos]

get a quality psu

ye i would but im not sure is the psu, i have this psu 9 years now and had no problem with it, i dont have a lot to spend and if its not the psu then i wont have money to buy the faulty component if its not the psu