Hi, 1st of all id like to say that my level of knowledge in computers is rather low so dont be surprised if some of my questions sounds stupid or if im slow to understand. Here it goes... so today i decided it was a good time to format my hard drive and reinstall everything so i started by reinstalling windows(without updating it so far), after I installed my wireless card drivers and then downloaded the lastest catalyst version(9.9). thats where the problem starts... so in my older version of catalyst, there used to be a tab in the menu called "crossfire" where i could enable/disable crossfire and now theres no crossfire tabs so I downloaded older versions to c if it was just because the new drivers didnt work for me and it didnt show up either. I checked in the device manager and it detects 2xhd4850. So far, i've tried to reinstall everything, install service pack 2(i have vista 64 bits) download updates and it still doesnt show up. Well i think that sums my problem pretty much... Thanks in advance for the help PS: if anymore information is needed just let me know.