[randomaccess]

700w will do you fine for crossfire but if you want to be safe rather than sorry then you may find stretching your budget slightly to get a 800w psu would be best.
:wink:

P.s. A well known tip is that if a psu is light then its bad quality and if it feels heavy its good quality, thats why if you pick up say a corsair psu it will be like holding a brick. 8)