PC Rebooting Problem

[GerIGuti]

So as the title already says I've been having rebooting problems for a while. This happens when I'm playing demanding games, sometimes just games in general. I think that this is due to the bad quality of the PSU because when the problems began it made "electric" noises and then the PC just rebooted, now the noises dissapeared but not the rebooting. Any ideas on why my PC is rebooting?

Specs:
A10-6800K
GTX 660 OC'd
f2a88x-d3h (motherboard)
Nox Urano SX 500W - If this was the problem I'll get the Seasonic S12-II 620W, any better ideas?

 

[ingtar33]

black screen rebooting (no windows blue screen of death) is typically a symptom of undervoltage/bad power. I think you're on the right track thinking of replacing the psu.