6 Replies Latest reply on Jan 14, 2013 2:49 AM by dislikeyou

    uefi boot and Windows 8 64 bit

    Serg

      Hi. I have installed the motherboard DH77EB. UEFI is enabled, Legacy bios is disabled. SATA - RAID, second videocard is Asus HD7850. At system boot, the message that "Video OptionRom Authenticate Fail", but Windows 8 loads and works fine (display cable is connected to internal grafic card). If the display cable is connected to an external video card, the download takes place at a black screen as long as you are prompted to enter Windows 8.

      Secure Boot enabled/disabled don't change this problem.

      Microsoft Support says this problem of system board.

      Help.