so im going to build my ultimate gaming system dream. I am also going to use it to mine litecoins. i bought one of amd's apu chips not realizing it had a dif motherboard involved a6-5400k . the fm2 mobos i see don't mention crossfire anywhere. Is this because apu's are made to scale with other gpus? or will crossfire not work with this motherboard architechture. I'd rather not buy another chip but i will if i lose the ability w/the 7950s. the few extra khash from the apu wouldn't be worth it.