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.
EDIT:
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.
Answer
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.
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