Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > 3 monitors on ATI cards?
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LyonheartAz   03-04-2008 at 07:14:54 PM

Hello, I have 2 3870s in crossfire. there are connections for 4 monitors but my system will only see two when i have 3 hooked up. Is it even possible to have 3 displays or do i have to turn something on in the bios ? Also a friend told me to take off the crossfire bridge ? He said he read that somewhere.. but that don't make since to me.

my system is
asus P5E3 MB
4 gigs off ddr3
QX6850 ( oc to 3.66 ) water cooled

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basketcase   03-04-2008 at 07:46:26 PM
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I could be wrong, but your friend may be right. I think the idea is to run them not in CF mode. When in CF, I think the PC reconizes the cards as one card, meaning only two DVI outputs. If you ran them not in CF, it would see them as 2 cards, 4 DVI out.

This is just a guess, though, and may be wrong.

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nerr   03-04-2008 at 08:00:41 PM
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I believe basketcase is right. You probably need to disable Crossfire to use 3 monitors.

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col-p-todd   03-04-2008 at 08:27:26 PM
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i agree with the other two, need to disable crossfire to hookup more monitors. but you will lose you peformance boost:(

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DrMaV   03-04-2008 at 09:22:39 PM
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Agreed, when crossfire is enabled, only 2 DVI outs work.

When crossfire is disabled in CCC, all 4 DVI outs work.

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Silver Graphics badge TheGreatGrapeApe   03-05-2008 at 12:28:09 AM
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You need to disable crossfire, but you don't need to unplug it, you can disable and enable it without rebooting now too.

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