How much power supply would I need?

[arshas]

I'm building my first PC here are some specs you may need to know -

Mother Board - Rampage IV Extreme - Extended ATX

CPU - 3820

Graphic Card - Still debating to either crossfire 7950s or get one 7970

Drive - DVD R / RW

Hard Drive - Seagate Momentus XT 750GB 7200RPM 32MB Cache 2.5" Solid State Hybrid Drive

Liquid Cooling - Corsair H100

 

[Shockattackr]

I would pick up http://www.newegg.com/Product/Product.aspx?Item=N82E16817151088

or

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139030

 

[arshas]

750 watts would be enough to over clock my cpu and gup?

I would like to keep my future upgrade options open

 

[Shockattackr]

yea, 750 will provide enough juice.

 

[Shockattackr]

Also look into some of these:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817207023

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182238

http://www.newegg.com/Product/Product.aspx?Item=N82E16817171048

 

[arshas]

thank you very much very helpful now I can affird to crossfire two 7970s .. I was gonna buy a 1200W power supply thinking I was gonna over clock GPUs and CPU and stuff it might need a lot of juice

 

[Shockattackr]

1200watt is over kill by alot.

 

[Deleted member 217926]

Here is the complete list of manufacturer recommended power requirements for systems with pretty much every graphics card configurations you can think of.

http://www.realhardtechx.com/index_archivos/Page362.htm

Remember this is for the whole system and the list assumes a "generic" power supply. If you get a high quality power supply you are generally fine with a bit less than the list says. High quality brands include Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ and Antec.