Two VGA displays on 5770?

Discussion in 'Mac Pro' started by Ovidiu.I, Jan 25, 2017.

  1. Ovidiu.I macrumors newbie

    Ovidiu.I

    Joined:
    Jan 25, 2017
    #1
    Hello everyone!

    I have a Mac Pro 1,1 (upgraded with ssd/21gb ram/ATI HD 5770 mac version) with Yosemite 10.10 installed.

    I want to connect 2 monitors to my mac.

    Ati HD 5770 has one DVI and two Mini DisplayPort outs.
    I bought an adaptor (Apple Original A1307) Mini DisplayPort -> VGA.

    So I`ve tried this configuration:
    DVI out --> DVI-to-VGA adapter --> VGA Monitor 1 (BenQ 22")
    Mini DP --> MDP-to-VGA adapter -- VGA Monitor 2 (Samsung 17")

    OSX "sees" both monitors (in system preferences->display), but signal is sent only to the monitor 1 (DVI out on video card).
    I`ve switched the monitors between them. Same problem, the monitor from MDP out, still not receiving signal.

    I`m doing something wrong? Or I need to set something in OSX?

    P.S. Excuse my english.
     
  2. justinkr macrumors member

    Joined:
    Jan 20, 2017
    #2
    Have you go to System preference >to display?
     
  3. Ovidiu.I thread starter macrumors newbie

    Ovidiu.I

    Joined:
    Jan 25, 2017
    #3
    Yes. I have two windows: one for BenQ and one for Samsung.
    And I can arrange them like this:[​IMG]

    But still I don`t have signal on the monitor inserted in Mini DisplayPort.
     
  4. Macschrauber macrumors member

    Joined:
    Dec 27, 2015
  5. justinkr macrumors member

    Joined:
    Jan 20, 2017
    #5
    The odds is some flashed card seem to have those kinda problem. Vga is not working for some like that.
     
  6. Ovidiu.I thread starter macrumors newbie

    Ovidiu.I

    Joined:
    Jan 25, 2017
    #6
    Yesterday I solved the problem. I bought a Mini DisplayPort to DVI active adapter. Everything works now.
     

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