As ATI confirmed the X1300 series videocards would be able to work in Crossfire without the need of a master card. You need to have a Crossfire-ready motherboard and two X1300 videocards, aside from that Catalyst 5.12 drivers are needed, because they are the first version that comes X1300 Crossfire support. We've build a Crossfire system with two Sapphire X1300 videocards and it really workd. More about X1300 Crossfire and Catalyst 5.12