What is the sufficient PSU need for my build?

Scorpinox

Honorable
Nov 18, 2013
8
0
10,510
My complete build can be found at this link:http://pcpartpicker.com/p/27rzz.

The estimated wattage provide by PCPartPicket is 672W and my current PSU is 750W.
I do intend to overclock my CPU and understand that will require more power to run.

Will I be fine with a 750W PSU or should I fork up another $75 for an 1000W PSU?

Thanks for your help!