Zerk2012 :
That is a low quality power supply and not what to buy with new parts.
Try to get one from this list either tier 1 or 2 and pay attention to the model numbers. 650 Watts would work just fine.
http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
Actually the new series CX750M is a very good bronze rated PSU.
In his case however I would argue 750w is tremendously excessive. 550w is more than enough even to overclock. The CX550M would be a good budget choice, however preferable would be an EVGA 550 G2 or GS, or the Seasonic G Series 550w.