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PostPosted: 20 Jan 2010, 21:06 
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Joined: 20 Jan 2010, 20:33
Posts: 53
Heya! Found this forum a few days ago and been reading it nonstop since but i havent managed to find a solution to my problem.
Here is my setup:

5850
BenQ 24" 2420HDB 1920 x 1080
BenQ 22" E2200HD 1920 x 1080
Samsung Syncmaster "17 1280 x 1024

I know the last screen is a few years older but still wanted to atleast have it activated in 2D.

I use DVI on my 2200 and my Syncmaster. The 2420HDB is powerd with an DP > Passive DVI adapter and works flawlessly ( Note that i can only get this screen working with the adapter the 22 and the samsung wont work )

I use the 9.12 Drivers ( The hotfix ) and in "Desktops and displays" in the CCC i see all three screens and everything seems fine. I Have no problem running two screens, all setups work there. However i can get the 3th activated. I cant extend it but only if iam using only one screen.

When i try to make a displaygroup i only get the option using 2 x 1 screens.

Been googling around and serching this forum but i cant seem to find a solution.
Anyone have tips on what to do?

Ceogar :)


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PostPosted: 21 Jan 2010, 21:52 
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Joined: 20 Aug 2009, 04:20
Posts: 2351
Location: Virginia
If I read this right, you can only get 2 screens at anyone time to work.

I feel it is because the passive adapter requires the use of one of the internal clocks that DVI needs to work. You can do something to alleviate this:

1. Buy a DP monitor.
2. Buy and Active DP->DVI Adapter (You might also have to flash the Video Card)
3. Buy a DP->VGA adapter, the conversion doesn't require a clock as it generates one in the adapter.

Sorry, there's nothing free on the list but the 3rd option is the cheapest at about $30 if you don't mind an analog signal.

BTW, Also with the different resolutions, the highest Eyefinity group you can make with your set of monitors is 3x1280x1024.

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PostPosted: 25 Jan 2010, 10:09 
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Joined: 20 Jan 2010, 20:33
Posts: 53
Ahh, that is what i tought so i orderd a passive dp > vga adapter A few days ago :p

Hope it arrives soon =) Thanks for clearing that out!


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PostPosted: 25 Jan 2010, 15:31 
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Joined: 13 Jan 2010, 14:25
Posts: 122
that 3rd screen will kill your options on resolution.


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PostPosted: 26 Jan 2010, 05:07 
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Joined: 20 Aug 2009, 04:20
Posts: 2351
Location: Virginia
that 3rd screen will kill your options on resolution.

only if you don't use a EDID mask or go above VGA's Bandwidth, Which that wont happen with those monitors. Just remember in Eyefinity mode, the highest res you can get is 3840x1024.

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Display: | 3 x Dell Ultrasharp 3007WFP-HC @ 7680x1600 | Dell u3011 |


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