seen alot of threads im planning on builiding a budget gaming pc with the a8-3870k APU i know from plenty of research that i can only use the 6670 GPU i look on newegg and all the GPU's say they arent xfire compatible can anyone help with this answer and please im choosing AMD i dont need intel specs amd cpu specs just the question answered. and if you know wich 6670 card to get and wich is best used together in xfire please post name of card radeon hd 6670 dont give me much details.