You should just know though, cheap power supplies can blow out regardless if they were being abused or not. And if/when the go, they can take the motherboard and/or other components with it. I had a cheap PSU blow out a motherboard once. The PSU is something you don't want to chince on and get a no name brand.
Looks like a very cheap powersupply and bad power can lead to faulty OC's. If suggest you upgrade to a name brand like OCZ, Corsair, PC Power & Cooling. Sometimes bad powersupplies can take other components with it when it goes.
Yours is cheap. Get a name brand, like the ones thermal reactor mentioned, even a 500w one and you won't have to worry about a new PSU for a long time even if you build a new PC.