380x capitan

I have read the Radeon Compatibility Guide But still haven't found any answers for my power color 380x I know that el captain has some problems but in my research I have found that both el captain and Yosemite have problems so which one would be the better??? thank you, :cool:

When I power up computer.It's black screen. I think it must be framebuffer issue. 380x devid is 1002:6938 this id is at amd9000controller.kext. This id is m285x. So how to fake 380x to M285X. When I use HD4600 enter system. and plug hdmi to 380x. The screen is normal.I this the card can use in...