How much power do I need for this build?! (overclocking involved)

chen123

Honorable
Aug 19, 2012
45
0
10,530
i5-4670K (hoping to overclock to 4.5)
ASUS Z87-PRO
MSI GTX 760 2GB DDR5 OC (am going to overclock it a bit further)
SEAGATE HDD 1TB 64MB 7200RPM
PLEXTOR M5 PRO 128GB XTREME
ASUS DRW-24D1ST
COOLER MASTER STORM SCOUT 2
COOLER MASTER HYPER 212 EVO 20th anniversary version (one extra 120MM fan)

If I am overclocking both the cpu and gpu, how much power will I need?
Which brands of psu do you guys suggest?

Thanks so much!