I have an on-board NVIDIA video card (Analog connector) and an add-on video Radeon video card (Dual DVI connector).

Can I use both at the same time? The goal is to have 3 monitors in this workstation. I currently have 2 since I'm using the Radeon card. I want to use the Analog connector provided by the on-board video card to have three monitors.


I'm using a Dell Optiplex 755.

I've tried to boot with monitors attached to both output. The bios refused with a message "Video Card configuration not supported." and stopped me from booting into Windows.

Weird thing is, I have another Optiplex 755 with the ALMOST the same configuration and it can handle output on both on-board and add-in. The only difference between the two setup is that this the working machine's add-in card outputs to only a single DVI while the failing one outputs to a proprietary dell video output that splits the signal to two different monitors.

  • 1
    It all depends on the motherboard - which you haven't provided. Some motherboards disable the onboard graphics when a dedicated video card is plugged in, others leave it enabled. – ChrisF May 25 '11 at 10:45
  • Please see edit. – Ian May 27 '11 at 4:35

If you do not have the latest Z series Intel chipset on your motherboard I seriously doubt that you will be able to use it in the way you intended.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.