Hello i have a HIS 4870x2 http://www.hisdigital.com/un/product2-24.shtm and im trying to learn about this cfx thing. Will be buying another 4870 x2 in a week . Now im trying to figure out what to do¿ Can't find another HIS so i prolly buy a saphire or asus or something else whichever brand i find. So please help me to find the appropriate card to make cfx.