Re: Dual mode display port to DVD-D adapter?

On 9/14/2022 6:43 PM, Boris wrote:
> Boris <[email protected]> wrote in
> news:[email protected]:
> 
>> Paul <[email protected]> wrote in news:[email protected]:
>>
>>> On 9/13/2022 11:40 PM, Boris wrote:
>>>> I received a Dell 8950, 12th gen i7, with a onboard graphics.  The
>> display
>>>> port is:
>>>>
>>>> Dual-Mode DisplayPort 1.4
>>>> Connect an external display or a projector.
>>>> NOTE: Besides a DisplayPort connector, this port can also provide
>> display
>>>> output to a DVI or HDMI connector with a
>>>> DisplayPort 1.4 adapter (sold separately).
>>>>
>>>> None of the monitors I have hanging around have HDMI.  They do have
>> DVD-D.
>>>> Is there such a thing as a dual mode display port to DVD-D adapter.
>>>> Is
>> so,
>>>> can you recommend a decent one?
>>>>
>>>> I don't do gaming or video editing.
>>>>
>>>> TIA
>>>>
>>>
>>> You have to check the details on the product, to make
>>> sure it's the right one for the monitor. Many monitors
>>> will be 1920x1080 @ 60Hz, and either adapter below would work.
>>> An Apple Cinema monitor, one of the old ones, might require
>>> the expensive adapter, as the Cinema monitor was dual link.
>>> It's one DVI connector, but there are two "sets" of pins,
>>> each one is termed to be a "link".
>>>
>>> DP to DVI single link $20   [ 1920x1080 or 1920x1200 CRTRB ? ]
>>> https://www.startech.com/en-us/audio-video-products/dp2dvi2
>>>
>>> DP to DVI dual link  $163   [ 2560x1600 or higher ]
>>> https://www.startech.com/en-us/audio-video-products/dp2dvid2
>>>
>>> I've put a notation next to the "most taxing" display mode.
>>> Displaying at 30Hz or even 24Hz, is OK for movie night, but
>>> not so good for normal monitor usage. That's why 60Hz is
>>> a better metric, than pretending that 24Hz is impressive or something.
>>> The DVI clock interface cannot go over 165MHz. On the cable
>>> this is multiplied by 10, and is actually 1650MHz. You can
>>> see the 2560x1600 @ 60Hz, the adapter is "loafing along" at
>>> only 135MHz.
>>>
>>> https://en.wikipedia.org/wiki/Digital_Visual_Interface
>>>
>>>      "Example display modes (single link):
>>>
>>>       SXGA (1280 × 1024) @ 85 Hz with GTF blanking (159 MHz)
>>>       HDTV (1920 × 1080) @ 60 Hz with CVT-RB blanking (139 MHz)
>>>       UXGA (1600 × 1200) @ 60 Hz with GTF blanking (161 MHz)
>>>
>>>       WUXGA (1920 × 1200) @ 60 Hz with CVT-RB blanking (154 MHz)
>> 154<165max
>>>
>>>       WQXGA (2560 × 1600) @ 30 Hz with CVT-RB blanking (132 MHz)
>>>
>>>       Example display modes (dual link):
>>>
>>>       QXGA (2048 × 1536) @ 72 Hz with CVT blanking (2 × 163 MHz)
>>>       HDTV (1920 × 1080) @ 144 Hz[6]
>>>       WUXGA (1920 × 1200) @ 120 Hz with CVT-RB blanking (2 × 154
>> MHz)
>>>
>>>       WQXGA (2560 × 1600) @ 60 Hz with CVT-RB blanking (2 × 135
>> MHz)  135<165max
>>>
>>>       WQUXGA (3840 × 2400) @ 30 Hz with CVT-RB blanking (2 × 146
>> MHz)
>>>      "
>>>
>>> DVI single link, half the digital pins are working at the time.
>>> DVI dual link, all the digital pins are working, to achieve the
>>> higher resolution. And this is due to the DVI spec being moribund
>>> and stopping at 165MHz. When clock rates have been climbing since
>>> then (for HDMI and DP) and allowing much higher resolutions. There
>>> is less interest (apparently), in making dual link DVI items. Maybe
>>> it took two adapter chips rather than just one. You never know.
>>> Some of these chips are re-purposed adapter chips used in TV sets
>>> (on the TV set IO board). That is why some of them are so cheap.
>>>
>>>      Paul
>>>
>>>
>>
>> Thanks for the reply.
>>
>> The connector looks like a DVI-I dual link connector, with it's 3x8
>> block of pinouts and the other four pinouts.  Can I assume that a dual
>> link DVI- I connector is used on all StarTech's display port converter
>> cables, but not all pins are wired, depending on it's intended use?  Or
>> is the picture incorrect?
>>
>> (You may notice that I'm posting on aioe.org, instead of E-S.  For some
>> unknown reason, to me, E-S gave me a 441: Excessive nymshifting.  I
>> rarely post, but read a lot.  I've probably posted three times in the
>> last week.  I did read on Narkive that there was a discussion of E-S
>> probably turning on nymshifting discipline measures about a month ago.)
>>
> 
> Odd.  I notice that E-S picked up this post, but I still can't post
> directly to E-S.  Due to different injection point?
> 

Look at the native resolution of your monitor. If the resolution is
low enough, to be covered by a single link converter, then the
cheap converter type (many models available) will suffice.

There aren't that many high-resolution monitors, with only
dual link connectors on them. The Apple Cinema would be an
example. At some point, interest would shift to various
versions of HDMI, to cover 2K or 4K monitors, and the DVI
would be kicked to the curb at that point.

Many times, the connector can be filled with pins, whether
single link or dual link. Seeing a full matrix, doesn't really
confirm anything about the product.

*******

As far as E-S is concerned, your activity should really be tracked by

    posting-account="U2FsdGVkX19o9J3FKYVvsEllX4syk1Z4"

the specific account, rather than by

    Boris <[email protected]>

If Ray was tracking by <[email protected]> , then it might
appear many people are sharing the same fake email and are
nym shifters. I don't think Ray would get this wrong, as
to what "item" he counts his nyms against. Boris should
be counted against the internal version of  "U2FsdGVkX19o9J3FKYVvsEllX4syk1Z4",
and since there is only the one nym, you would not have broken
any rules.

    Paul