Which PSU For 7970 GHZ + 3770k?

[gandraga]

Exactly the title. I need to know which Power Supply I would want to get for my new build

Specs:
7970 GHZ
3770k
16GB Ram
128GB SSD
1TB HDD
And a Maximus Gene Mobo

I'm thinking around 750w - 850w but I'm not sure. I'm looking for Best bang for buck mainly, thanks.

 

[djangoringo]

http://www.newegg.com/Product/Product.aspx?Item=N82E16817703027&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=
or ncix : http://us.ncix.com/products/?sku=63239&vpn=P1850SNLB9&manufacture=XFX&promoid=1373
It will do even for crossfire setup.