Question +12V

Your computer shouldn't even turn on if it's that low. What value does the BIOS show for the 12V rail?

What exact make/model of PSU?
I haven't checked the BIOS yet, before this the value was at around 11.34, which I still found pretty low, could this he the reason that ASUS Anti-surge was happening? Btw the PSU is Nox NX750
 
Hmm, can't find much info on that unit but from the info they provide it doesn't look great.

Spec is 12V +- 5%, so 11.4V would be the minimum. But any decent PSU should do much better than that, especially if the PC is at idle and therefore not consuming much power.