Phenom II x4 955 and Crossfire Power Supply?

I am putting together the following system and was wondering what wattage power supply I would need? I know enough not to buy a no-name brand.

AMD Phenom II X4 955
MSI 790FX-GD70 AM3
Western Digital Caviar Green WD5000AADS 500GB
CORSAIR XMS3 4GB
Crossfire: 2-XFX HD-489A-ZDFC Radeon HD 4890 1GB
LG 22x Dvd Burner GH22NP20
Case-XION Onyx XON-303
Windows Vista Home Premium w/Windows 7 coupon
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More about phenom crossfire power supply
  1. 750W.

    My recommendation would be Corsair TX or HX.
  2. Thanks a lot!
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