What psu

[i dont want a username]

i am building a budget gaming pc with these components but i dont know what psu would work.

-amd athlon 2 dual or tri core cpu with stock cooler
-2x xfx radeon hd 6850 xxx or 6870 xxx
-8 gb mushkin silverline 1333mh ddr3 ram
-gigabyte ga990fxa ud3 990fx
-500gb 7,200rpm hdd
-300mbs gigabit lan wireless pci-e card
-standard 24x dvd drive
-2 or 3 case fans

i won't be putting both gpus in at the same time but i will put in a second at a later date.
i would prefer the psu to have a single 12v rail and i like the look of the xfx 650w xxx edition modular psu but it is a little expensive and i dont know if it would be enough. i could also do with a little more power if i add anything in the future.

thanks in advance.

 

[Outlander_04]

for cf 6870's you need 650 watts
Corsair and Antec

 

[nkseal]

Corsair...antec eh they are ok...id get a corsair or if you can pc power and cooling are the absolute best.

 

[beenthere]

Seasonic or PC Power and Cooling would be my top choices.

 

[geofelt]

AMD recommends a 600w psu with 4 6 pin pci-e connectors for dual cards:
http://www.amd.com/us/products/desktop/graphics/amd-radeon-hd-68706000/hd-6870/Pages/amd-radeon-hd-6870-overview.aspx#3

Do not go cheap on a psu; get a quality unit.
My short list of quality psu's would include Seasonic, Antec, PC P&C, Corsair, and Antec.

For what it is worth, I doubt that an athlon 2 or 3 core cpu can effectively drive such a crossfire graphics configuration.
An Intel 2100 would be better, read this article:
http://www.tomshardware.com/reviews/best-gaming-cpu-core-i3-2100-phenom-ii-x6-1075t,2859.html

 

[Sky03]

http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&Description=Seasonic+620&x=0&y=0

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371048&Tpk=Antec%20hcg%20620

http://www.newegg.com/Product/Product.aspx?Item=N82E16817207014&Tpk=Xfx%20core%20edition%20650

http://www.newegg.com/Product/Product.aspx?Item=N82E16817703026