Hello,
I have a S2600CP2 board with a AMD R9 380 GPU installed on a pcie x8 slot. It work fine is EFI optimized boot is disabled. But as soon as I turn that on, it can't p*** the board self-check. The diagnosis led light as the image
well, i had set Use Legacy Video for EFI OS to enabled but no working.
Any solutions?
Many thanks.