How do I disable my onboard video card to enable another video card?

by on May 17, 2011

Q: If your onboard video connection breaks. How can you bypass the on board video and use a video card when you cant see what is on the screen? I have a ASUS M3A78-T.

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2 Responses to “How do I disable my onboard video card to enable another video card?”

    It sounds like you’ve already installed a new card, and have your monitor hooked up to the new card, but you aren’t getting anything on your screen. This is no way to change these BIOS screens without a working screen.

    Ideally the BIOS should detect the new card and set is as primary, but since it’s not you might be able to get it to detect by wiping the BIOS settings. See Page 2-18 of the motherboard manual for instructions. ( see for a pdf copy if needed)

    Also here are the normal BIOS settings screens you’d want to set:
    Normally, In the BIOS go to the Advanced menu, select Internal Graphics Configuration and set Internal Graphics Mode to Disable.

    Additionally, in the Onboard devices screen you should set the Primary Display Adapter from Onboard to PCI-E

    If none of this works for you then I’d suggest replacing the motherboard, there is a good chance that there might be some other problems with the board anyway, kind of unusual for just part of a mobo to die like that.

    Good Luck!


    Thanks for all the info! The board itself did not fail. The monitor cable got stepped on and it tweeked the connection port. I tried to re-insert the connections but they broke off.