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Trouble using Dual displays (extend display from on board video to PCI card) optiplex 760

Posted on 2013-01-25
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Last Modified: 2016-11-23
Hello,

We just purchased a refurbished dell optiplex 760 that has an onboard video display. We also then installed a second video card via PCI. For some reason the machine will only recognize one at a time! I went into the bios and toggled the setting, but this only activates either the PCI or the onboard, not both!

What am I missing?
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Question by:jcaprio
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by:norcalty
norcalty earned 500 total points
ID: 38819428
Dells design their system boards to automatically turn off the onboard video when you add an onboard card.  This is built into the BIOS and they unfortunately do not give the owner/user the ability to use them both.  We use the 760's all the time with dual displays.  We use ATI Radeon 3450's in the machines with the dell Y splitter on two monitors and it works great.

http://www.amazon.com/ATI-Radeon-Express-DMS-59-Profile/dp/B004QPR04O/ref=sr_1_2?ie=UTF8&qid=1359133842&sr=8-2&keywords=ati+radeon+3450
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by:jcaprio
ID: 38819497
Silly question but could I just use the y splitter with the on board card? Or use the GeForce PCI card I currently have with the y splitter?
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by:norcalty
ID: 38819521
The onboard card doesn't support dual displays.  Which Gforce card are you using?  It has to support dual link to take a splitter. Usually if they support it they will come with a splitter.
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Accepted Solution

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jcaprio earned 0 total points
ID: 38877117
Turns out the video card has 2 VGA ports! works great now!
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Author Comment

by:jcaprio
ID: 38877428
I've requested that this question be closed as follows:

Accepted answer: 0 points for jcaprio's comment #a38877117

for the following reason:

I solved the issue myself
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by:norcalty
ID: 38877429
The problem posted was that he could not use both the onboard and installed card at the same time. The correct solution was posted, you cannot use both the onboard and addon video card at the same time as Dell's BIOS automatically disabled the onboard video when it detects another card.  His solution was to use an installed card with two ports after finding that he could not use a vga connection onboard and on a card simultaneously.  It seems my answer was correct in this case.
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by:norcalty
ID: 38896931
I still stand by my objection, that the first answer I posted was the correct answer that lead jcaprio to fix his issue.
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by:norcalty
ID: 38896934
ID 38819428 is the answer that should be accepted.
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