Rig Shutting Down (Power Surge)

[CR7xMarcelo]

So I have two sapphire HD 7950´s and an asus f2a55 mobo, with a bronze corsairCX750 watt power supply.

The problem is that the pc shuts down when i leave it on at night, and the MOBO says it detected a POWER SURGE and it shutdown to prevent damage.
Im waiting till i can change the psu, cause I think thats the problem, but ill keep mining unitil i can do that.
My question is if its bad for my rig if it keeps shutting down like that..

[Kenshin]

I don't think there is going to be any problem.