Ive experienced the black screen issue my self. But once ive ventured into maybe changing a few things like target thermal temps and max fan speeds the problem was solved for me. i lowered the max temps the card can hit to 85C and im letting the fans go full 100% ( but they still wont hit that high ) and problem solved for me with not core clock drops after the temps are maintained.
Do u think the hardware is shotty? yes probably.
Do i think theres the possibility of them making it better? yes
But being someone who has bought the latest amd card now from the 4870 - R9 290x on launch dates iv always understood one thing. Im a beta tester more or less and ive been fine with that.
Tri-Fire R9 290x 2560X1440
Benchmarking youtube channel http://www.youtube.com/user/kdawgmaster?feature=mhum