Firstly it would be great if you added a link to the PSU that you are refering to.
Secondly, what system are you running because wattage means nothing. That is a low quality PSU and to be honest I wouldn't use it. It has low efficiency, and has insufficient power on the 12V rails for a decent system, and is only ATX 2.3 design standard meaning it cannot truely provide dual rail power output.
Avoid. Post your specs and I will help you get a quality PSU.