No! The Cooler Master eXtreme Power Plus series are garbage! Get a new PSU ASAP! There are good deals on the XFX and EVGA PSUs depending on where you are able to buy from.
Here's a review of the eXtreme Power Plus 500W PSU, its not good...
http://www.hardwaresecrets.com/article/Cooler-Master-eXtreme-Power-Plus-500-W-Power-Supply-Review/728