It's got some problematic reviews on other retailer sites (Amazon). Honestly you won't need more than 525W with that system (475 if you don't plan on doing much upgrading). Try this one. More expensive yes, but it's a reputable brand and it has some good ratings to back it up.
I would STAY AWAY from bargain basement PSU's like that. What makes a power supply good is not always its stats, but the quality of its components. Buying a cheaply made power supply is the easiest and quickest way to torch the expensive components. That being said 650 watts on a quality PSU (antec, corsair, seasonic) will be more than enough.