Vga>dvi

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  • imported_Neptune
    Senior Member
    • Aug 2007
    • 1021

    #1

    Vga>dvi

    I got a new LG 19" wide monitor, and i noticed it has dvi and vga input on the back. I have an old dvi>vga converter lying around, and i was wondering if i could hook it up. If i plug vga into the back of my computer, the converter on the other end, and plug the converter into the dvi port on the back of the monitor, will i get better quality, or not? do i need dvi>vga>dvi or will vga>dvi do it?

    also i was wondering what is the difference between vga and dvi? Any noticeable change in picture quality?
  • solofowaffles
    Member
    • May 2006
    • 4306

    #2
    Dvi is supposed to be better quality.

    Comment

    • looqas

      #3
      DVI is all digital signal whereas VGA is analogue.

      The signal with DVI should be better. It depends on the monitor if VGA is inferior. In most cases there is no difference. If you are able you can try both modes and choose the one that seems better to you subjectively.

      Comment

      • Vreki
        Senior Member
        • Oct 2007
        • 4226

        #4
        Originally posted by looqas View Post
        DVI is all digital signal whereas VGA is analogue.

        The signal with DVI should be better. It depends on the monitor if VGA is inferior. In most cases there is no difference. If you are able you can try both modes and choose the one that seems better to you subjectively.
        Yeah, but if he start by using VGA from his GFX card, then he is not going to magically convert it to a better quality digital DVI.

        I am a bit curios about the DVI "converter". Those I have seen are actually DVI to VGA adapters that just passes the analog signal from the DVI (Which can carry both) to a VGA connector.

        If you only have VGA out then you might as well use the VGA in on the monitor.

        Read more about DVI here: http://en.wikipedia.org/wiki/Dvi

        Comment

        • Minicoop503

          #5
          Yeah, if you use the converter, it will just convert it back to an analog signal, which would put it back at vga quality.

          Comment

          • imported_Neptune
            Senior Member
            • Aug 2007
            • 1021

            #6
            Thats what i thought, thank you for the help.

            Comment

            • Warhawk

              #7
              And yes there is a small difference in vga vs. dvi. I have 2 identical monitors side by side, one dvi, the other vga. If you compare points on my desktop, you can tell the dvi is a little sharper and has truer colors.

              Comment

              • Vreki
                Senior Member
                • Oct 2007
                • 4226

                #8
                Its also worth considering that CRT = analog display while LCD = digital display.

                So it is probably best to use the signal native to your monitor so it doesn't have to convert anything. Not that I can see any reason why a CRT monitor would have a DVI connector, but you never know.

                I got the impression that Neptune didn't have a DVI-out on his GFX card (it must be from last millenium), so assuming that his new monitor is LCD there will have to be an analog to digital conversion somewhere, probably inside his monitor.

                DVI to DVI must be the optimal, but lacking that option I don't think there is much he can do to improve a VGA output.

                Comment

                • imported_Neptune
                  Senior Member
                  • Aug 2007
                  • 1021

                  #9
                  Originally posted by Vreki View Post
                  Its also worth considering that CRT = analog display while LCD = digital display.

                  So it is probably best to use the signal native to your monitor so it doesn't have to convert anything. Not that I can see any reason why a CRT monitor would have a DVI connector, but you never know.

                  I got the impression that Neptune didn't have a DVI-out on his GFX card (it must be from last millenium), so assuming that his new monitor is LCD there will have to be an analog to digital conversion somewhere, probably inside his monitor.

                  DVI to DVI must be the optimal, but lacking that option I don't think there is much he can do to improve a VGA output.
                  it does have a dvi on the back of the gfx card. So as i understand it, dvi>vga converters are only for older monitors to "fit" newer gfx cards, and the converter cant actually improve the quality of the signal.

                  Comment

                  • camper.
                    Member
                    • Dec 2006
                    • 3459

                    #10
                    You want DVI==>DVI.

                    A convertor only passes the analogue VGA signal into the analogue connectors on the DVI connector in any case. It's useful if and only if you are wiring a VGA-only graphics card to a DVI-only monitor.

                    DVI should be far higher quality for LCDs because you (as in your monitor) won't have to worry about things like sync rates, DVI provides a 1:1 pixel mapping between the graphics card and the monitor's pixels. If your monitor is really crap, it might reduce the latency as well.

                    Comment

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