Kind of skimmed over that motherboard you mentioned. It does not support Crossfire, only SLI, so there's your problem.
Thanks for the feedback! But I''m not using SLI or Crossfire, I mentioned earlier they are used for mining litecoins. But I'm going to try out upgrading the PSU to 750 watts like the other guy mentioned. If you are anyone else has other solutions feel free to post away!