more update:
been running single r9 card, because of the black screen of death. crossfire instantly black screen. so, I checked my 2nd card before I rma or refund. it ran fine.
beta9.4 fixed supposed to fix the black screen. so far, I'm playing 5760xx1080 crossfire/silent mode with the beta elder scroll working flawlessly. I haven't tired uber mode or OC , if it crashes. maybe later.