Trouble running three monitors from a 6850

I have a Sapphire HD 6850 card and three monitors - Dell 3007WFP (2560x1600), Dell 2001FP (1600x1200) and Samsung 204B (1600x1200).

I'm having trouble running all in parallel.

If I used DisplayPort for the 3007WFP and DVI-D for the other two I could extend the desktop, but the DisplayPort would go into sleep mode very often even during me actively using the system - apparently it is a known Dell monitor problem? I had to unplug it and plug it back for it to wake up which was very annoying.

I bought a DisplayPort to DVI adapter and used that, trying it on all three monitors, however whichever way it would only let me extend two then, with the third staying disabled both if using the Windows "Screen Resolution" Control Panel application or using the Catalyst Control Center.

Any ideas? I'm ready to buy some other reasonably priced adapter but not a new monitor with a DisplayPort :).
4 answers Last reply
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  1. Was it an active adapter?

    I've had 3 of these adapters and 2 have failed on me so I'm somewhat unconvinced about them.

    My latest one works absolutely fine though, it's the sapphire one you can see here -

    All my screens are identical however, I can only imagine how dodgy 3 different ones might be.
  2. No, I think it was a passive one I think. But I thought I only needed an active one only for EyeFinity, which I don't need.
  3. Also the one you link to is Single-Link, I'm a bit concerned as I read elsewhere I need to run the largest monitor over the DisplayPort, but a Single-Link adapter won't support 2650x1600.
  4. Yes you could be right about that. I had a dual link one but it was very expensive.
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