Mini Display port to DVI adapter to then VGA?

Discussion in 'Buying Tips and Advice' started by waloshin, Dec 28, 2008.

  1. waloshin macrumors 68040

    waloshin

    Joined:
    Oct 9, 2008
    #1
    Is it possible to go from a Mini DisplayPort to DVI Adapter to then a VGA, so you can use the VGA end to connect to a CRT display or projector?

    Using a connector like this:

    [​IMG]
     
  2. Tallest Skil macrumors P6

    Tallest Skil

    Joined:
    Aug 13, 2006
    Location:
    1 Geostationary Tower Plaza
    #2
    Do you already have the mini DisplayPort to DVI adapter?
     
  3. waloshin thread starter macrumors 68040

    waloshin

    Joined:
    Oct 9, 2008
    #3
    No ,but I do have the dvi - vga adapter, so I thought it would be cheaper, and less wires, if I could do it through dvi - vga.
     
  4. 11800506 macrumors 65816

    11800506

    Joined:
    Oct 31, 2007
    Location:
    Washington D.C. Area
    #4
    It's not possible because Mini displayport to DVI only carries the digital signal, not digital and analog and because VGA uses analog it won't work.
     
  5. aaquib macrumors 65816

    aaquib

    Joined:
    Sep 11, 2007
    Location:
    Toronto, Canada
    #5
    But you're attaching the cable onto the dvi end of the cable, so shouldn't the signal be converted? I'm hoping this works too, as I don't want to purchase a mini displayport to VGA adapter for just 1 day.
     
  6. astudentis macrumors regular

    Joined:
    Oct 7, 2007
    #6
    yea i know eh... normally to connect to monitor, you are most often going to use dvi.... but to give presentations once in a while... you need vga to connect to those projectors
     
  7. GreatDrok macrumors 6502a

    GreatDrok

    Joined:
    May 1, 2006
    Location:
    New Zealand
    #7
    The standard DVI connector contains both the digital and analogue output. A DVI to VGA adaptor (not a converter) simply takes the analogue output and puts it through a VGA plug.

    Mini Display Port also carries digital and analogue outputs and the DVI adaptor will only carry the digital output so putting a DVI to VGA adaptor on will not produce a picture. You need to buy the display port to VGA adaptor.
     
  8. 11800506 macrumors 65816

    11800506

    Joined:
    Oct 31, 2007
    Location:
    Washington D.C. Area
    #8
    As I understand it to be, the Mini displayport to DVI is carries a DVI-D signal which is solely digital. Regular DVI is often a DVI-I signal which carries both digital and analog signals which is why a DVI to VGA adapter works in those cases. There is no conversion of signals going on as the VGA adapter simply uses the analog signal it is supplied thus why a DVI-D signal won't support VGA.

    Edit: Beaten to it. Hopefully because of the free licensing eventually we'll see some third party cables which may be cheaper but only time will tell.
     

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