help with using duel moniters on dell gx270

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Was hoping someone could answer a question for me. I am trying to hook up duel moniters on a dell optiplex gx270. I have the on board video and I used an agp slotted nividi video card. It appears that the agp card is canceling out the on board video. Is there a setting that I can change that will allow it to see both, or do I just need to put a pci slotted card in. I saw in the bios where you could set to auto or agp on the moniter, course neither setting made a difference.

 

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not entirely sure on this but I think you will need a splitter cable to plug into the graphics card port as inserting a card does, as you say, disable the onboard video output. At least thats the way it works with my HP machines.

Jiggy.

 

As far as i know what Jiggy says is right, the onboard gets made redundent when a new card is slotted in, if the card does not support 2 monitors (2 vga connections or 1 vga 1 DVI) then you will need a splitter Im afraid