could i say xfire
http://www.overclockers.co.uk/showproduct.php?prodid=GX-264-AS&groupid=701&catid=56&subcat=1982
with
http://www.overclockers.co.uk/showproduct.php?prodid=GX-047-HS&groupid=701&catid=56&subcat=1982
or do they need 2 be same make of cards
http://www.overclockers.co.uk/showproduct.php?prodid=GX-264-AS&groupid=701&catid=56&subcat=1982
with
http://www.overclockers.co.uk/showproduct.php?prodid=GX-047-HS&groupid=701&catid=56&subcat=1982
or do they need 2 be same make of cards