So i have b85 killer motherboard,could i run 2x rx 480 ( crossfire) on x16 x4,would bottleneck be mayor on x4?Also I have a chance to either upgrade to I5 4690K or go for fx 8350 and 970 pro carbon board..which one would be better?I like editing,will 8350 render faster than 4690k (if both are overclocked) going for 8350 970pro carbon combo would maybe be better deal for me cause i have 970(dont have to buy 2x480 than) and then could sli them,but then again if i5 4690k is better performance ill take it.