I may want to overclock i5 4670K, how much power should i get

[PCNOOBHELP]

I am going to get these pc parts (hopefully): http://pcpartpicker.com/p/2bV1I.

I would like to know, if I overclock the i5 4670K to, say 4.2 ghz would i need 750w, or could i downgrade to 600w (CX600M).

Thank you in advance, PCNOOB out

 

[icraft]

600w is safe as long as it is high quality. This one is good.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151125