It will work just fine. If it doesn't work you can replace it anyway, but I'd be very surprised if it didn't work.
If it's this unit then there is a good chance it wont work properly and can even have potential catastrophic consequences. http://www.hardwaresecrets.com/cooler-master-extreme-2-475-w-power-supply-review/
This is why I asked for the model. But there is a good chance it's one of Cooler Masters poor quality units.