hi I have 2x 5870 crossfire ,1 asus and 1 sapphire.
windows 10 home 64bit
msi mpower max z87
4x4gb ddr3 2400 gskill
ssd 120gb Samsung evo
intel i7 4770k 3.5 @ 4.4ghz
with new amd crimson drivers black screen and flashing image with saund on directx9 games with crossfire on ,with crossfire off no problem.
all games with directx11/10 work perfect with crossfire on and off with all drivers.
with no amd crimson drivers work all perfect with crossfire on and off.
and no - enable amd radeon dual graphics for directx 9/10/11 and openGL ....
help i'm new in this forum ,and sory for my English.