Can CM GX550 handle XFX 6970?

My friend want to sell his XFX 6970 to me with reasonable price. So i've decided to upgrade my GC from 7770 to 6970. Does my CM 460watt PSU will be able to handle it? If not, i wish to upgrade my PSU to CM GX550. The GX550 was listed as certified PSU at AMD website for the 6970 card. Just need confirmation whether the GX550 can handle my 6970 later.

Lastly, does the XFX 6970 fit in CM 690 II case? Not the advanced one.

Sorry for my bad english.


My currently PC spec :

AMD Phenom 955 BE OC'ed 4gHz
Gigabyte 970A DS3
4GB x2 Corsair Vengeance LP
Sapphire 7770 Vapor X
CM 460 extreme power PSU
Noctua NH D14
CM 690 II