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ATI Radeon HD 5770 with 3 displays?

7046 Views 38 Replies Latest reply: Dec 12, 2013 2:26 PM by ludy13 RSS
  • lswing217tb2 Calculating status...
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    Feb 20, 2013 10:35 AM (in response to lswing217tb2)

    All three working now, thanks!

     

    Bought this active (I had a cheap passive) mdp > hdmi (this then connects to an hdmi>cat5 converter box 60' over to a tv).

    StarTech.com MDP2HDS Mini DisplayPort Male to HDMI Female Active Adapter Audio Converter 1920x1200

     

    Other monitors are as before, mdp>dp and dvi>hdmi, standard cables.

     

    Cheers!

  • nwind Calculating status...
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    Aug 18, 2013 9:19 PM (in response to Kelly Crossley)

    Guys,

     

     

    I have late 2009 MP and two monitors with both DVI & display port (NEC PA301W & NEC PA271W) and they where working fine.

    I need a third one and was trying to connect an old 20" HP LP2065 (2xDVI 1600x1200) but no success. It was connected to DVI port.

    System is kind of detect it (I can see 3 monitors in display settings) and unit stay active (signal is going through the cable) but screen is black.

    According to Apple note this config should be perfectly supported:

    http://support.apple.com/kb/HT4279

     

     

    HP unit is fine since it works fine on my MBP.

     

     

    Eventually I connected it with installation of second old stock NVIDIA card but don't like this setup.

     

     

    Is anybody have some suggestions?

     

     

    Thanks

  • Grant Bennet-Alder Level 8 Level 8 (48,095 points)
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    Aug 18, 2013 10:26 PM (in response to nwind)

    Your description is ambiguous. How can you connect two displays with DVI and DisplayPort? That makes four ports and it will not work that way anyway.

     

    We cannot see your cabling. Please lay out in REALLY simple terms what is connected to what with what adapters and cables.

     

    Thanks!

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • nwind Level 1 Level 1 (0 points)
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    Aug 19, 2013 6:29 AM (in response to Grant Bennet-Alder)

    To clarify:

     

    Both NEC displays has ability to be connected either through DVI or display port.

     

    Actual not properly working config:

     

    2 x NEC connected directly through display port to 5770.

    HP connected directly through DVI to 5770.

    All passive connections.

     

    Actual working config:

     

    2 x NEC connected directly through display port to 5770.

    HP connected directly through DVI (or display port to DVI Apple adapter) to stock NVIDIA card.

    All passive connections.

     

    Thanks

  • Grant Bennet-Alder Level 8 Level 8 (48,095 points)
    Currently Being Moderated
    Aug 19, 2013 8:52 AM (in response to nwind)

    Your first configuration above should be working perfectly. You are interpreting the table in that article correctly.

     

    To debug, connect only ONE DisplayPort display and the DVI display and see if you get a pleasant picture on each, at the top resolution you desire.

     

    ¿Working ok now?

    --Yes, 5770 card may have a hardware probelm (not a design flaw) with 3 displays.

    --No, using Dual-Link DVI cable, no bent pins, cable not overly long, etc?

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • lswing217tb2 Level 1 Level 1 (0 points)
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    Aug 19, 2013 8:58 AM (in response to nwind)

    Your problem is right there, all passive. Look at my earlier post, you need one active connector. I believe the active plug type is your choice, but only two passive at a time are supported.

  • nwind Level 1 Level 1 (0 points)
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    Aug 19, 2013 9:15 AM (in response to lswing217tb2)

    I think it different and perhaps DVI port is not functional.

    It's not working even with only HP connected to DVI and nothing else.

    Not working is funny. With all 3 connected as I mention I can see 3rd monitor in display settings and it's detectable (keep it awaked as well) but with completely black screen. Maybe signal from 5770 is just marginal for HP display?

    Cable and monitor are OK since they are working on the second card and my MBP through adapter.

     

    BTW according to Apple with straight connection to all 3 ports (no conversion) it must be perfectly functional with all passive connections.

     

    See the first line on they table:

     

    http://support.apple.com/kb/HT4279

  • Grant Bennet-Alder Level 8 Level 8 (48,095 points)
    Currently Being Moderated
    Aug 19, 2013 12:34 PM (in response to nwind)

    It's not working even with only HP connected to DVI and nothing else.

    Then you have a Hardware problem -- not a design problem, and not a 3-monitors problem.

     

    If you are satisfied it is not the display or its cable, the problem is in the DVI port on the card.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers
  • ludy13 Calculating status...
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    Dec 12, 2013 2:26 PM (in response to Kelly Crossley)

    it seems like there are quite a bit of issues using 3 monitors on the 5770.. how about connecting your two monitors on it and using a blackmagic card for the tv?

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