Crossfire querey

[JG1]

Hi guys, my PC is about a year old now and i see that my graphics card is pretty cheap to buy on ebay etc. My question - is it worth while buying another one and going crossfire? Do i just need exactly the same card and set one to become a master and one a slave? My specs are below.

 

[SeanT]

If it is all compatible then that'll be a pretty quick setup compared to selling yours and spending the same!!