Which power supply to use for i7 920 OCing?

[sridharrreddy]

Hi there,
I am buying a i7 920 and would like to overclock it to 3.6 GHz. I am planning to buy Antec or CoolerMaster case. Will the built in power supply suffice or should I buy external PS?
By the way, how many watts of power will it take to OC to 3.6ghz. Is it 650 or 750?

Thanks,
Reddy.

 

[shubham1401]

First tell what's the wattage of the psu coming with that case.
Generally the psu's that come with cases are not that great.

And which video card are you running?

I think you will need a 850w+ PSU for OCing that with a decent video card.

 

[sridharrreddy]

My parts are

i7 920 - Tobe OCed to 3.6 Ghz
Asus P6T
Quadro FX 1800
Patriot 6x 2GB 1333
WD Black 2X 640GB

I am just stuck with choosing the right PSU. Will any Cooler Master or Antec have a 850W default PSU?