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Displayport to HDMI Adapter for nVidia Quadro 5000

Discussion in 'Nvidia' started by W, Jan 14, 2014.

  1. W

    W Guest

    I have a Dell T7600 with a Quadro 5000. I need to attach the first
    DisplayPort to an HDMI port on a TV monitor running 1920x1080P. I have
    many computers attached to the same TV and those work fine with digital
    display connections at 1920x1080, connected by HDMI. With the Quadro, the
    preboot BIOS screen is corrupted, and it has a square area in the BIOS text
    eaten out of the image. What kind of DisplayPort to HDMI adapter is
    required for Quadro 5000? There are so many standards to support on these
    things I am thinking I may have purchased the wrong adapter.

    The Displayport to HDMI adapter I purchased was this one:


    And the screen is not working.
    W, Jan 14, 2014
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  2. W

    Paul Guest

    Try the Wikipedia article on DisplayPort.

    DisplayPort has active and passive adapters. From the
    users point of view, one big difference is price.

    Things like VGA, you suspect that can't be passive,
    as VGA is analog and DisplayPort is digital. So that
    one is going to be more expensive and an "active" converter.

    DisplayPort to HDMI should be passive. At least, as
    long as the DisplayPort has an HDMI mode.


    "However, Dual-Mode DisplayPorts are designed to transmit a
    single-link DVI or HDMI 1.2/1.4 protocol across the interface through
    the use of an external passive adapter that selects the desired signal
    and converts the electrical signaling from LVDS to TMDS."

    So you're looking for video cards with a "Dual-Mode DisplayPort".
    Or, if the video card is lame, a capable active converter.


    "Unlike a passive adapter, the MDP2HDS actively converts single-mode and
    dual-mode DisplayPort output, which is ideal for graphics cards that do
    not output dual mode/multi-mode (DP++) signals, such as ATI Eyefinity cards.
    The Mini DP to HDMI adapter is compatible with Intel Thunderbolt , when
    connected directly to a supporting DisplayPort over Thunderbolt I/O port."

    "Maximum Digital Resolutions: 1920x1200"

    So it's not the perfect adapter, because it doesn't do the
    higher resolutions.

    Now, when I see an "active" device, I look for a power source.
    No power adapter comes with that thing, which means there must be a power
    pin on DisplayPort connectors. From the Wikipedia article...

    Pin 20 DP_PWR Power for connector (3.3 V 500 mA)

    So there is a source of power to run the active adapter,
    and no wall wart is needed (apparently). If the converter
    needed more power than that, then you'd need an adapter.
    Chips are available that easily run off 3.3V now. Chip designs
    can go as low as around 1.0V or so, but then it becomes
    difficult to do higher amplitude I/O signals with such a
    low source. With 3.3V, that can do lots of I/O standards
    in an adequate way.

    Paul, Jan 14, 2014
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