Are all Gecube x800GTOs crossfire ready?

Hey guys,
if oyu look here http://www.lowestonweb.com/Products/...2-1B37EA69FAAC they sell the x800gto by gecube for 120, but I heard it is crossfire ready, are all gecube GTOs crossfire ready???? I am just wondering because I am looking for a card between 150 and 80 and this may be perfect if it is crossfire supported! I looked everywhere but i cant find out the answer
thanks

I was under the assumption that all X8** cards supported crossfire, you will just need to find a 'Master card' to partner up with it to enable crossfire.