might be building a second build, how much wattage do i need?

[ksood]

i might build a second build and here is what im planning

I7 3770K
Z77X-UP5 TH
EVGA 670 FTW edition
120gb sandisk extreme
1.5tb Caviar Black
1.5tb Caviar Green
Antec p280
Cooler master 612
Corsair vengeance 2x8gb

now i plan to use 3 hard drives and do a overclock to 4ghz. so how much wattage would be enough? i was planning on using a 650 watt corsair psu: http://www.amazon.com/Corsair-Enthusiast-TX650M-Certified-Performance/dp/B005E98I0G/ref=sr_1_4?ie=UTF8&qid=1351314632&sr=8-4&keywords=corsair+650

 

[Going Bald]

i might build a second build and here is what im planning

I7 3770K
Z77X-UP5 TH
EVGA 670 FTW edition
120gb sandisk extreme
1.5tb Caviar Black
1.5tb Caviar Green
Antec p280
Cooler master 612
Corsair vengeance 2x8gb

now i plan to use 3 hard drives and do a overclock to 4ghz. so how much wattage would be enough? i was planning on using a 650 watt corsair psu: http://www.amazon.com/Corsair-Enthusiast-TX650M-Certified-Performance/dp/B005E98I0G/ref=sr_1_4?ie=UTF8&qid=1351314632&sr=8-4&keywords=corsair+650

http://www.corsair.com/us/learn_n_explore/?psu=yes

fill in the blanks with your hardware.