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How can I tell which vid cards support dual DVI displays?

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dter...@hotmail.com

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May 10, 2008, 12:14:10 AM5/10/08
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Some vid cards support two DVI monitors via the use of a splitter
cable, even though they only have one DVI out. Do they all support
that? I never see it say so in the specs...

thanks

Mike Ruskai

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May 10, 2008, 11:16:35 AM5/10/08
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On or about Fri, 9 May 2008 21:14:10 -0700 (PDT) did dter...@hotmail.com
dribble thusly:

>
>Some vid cards support two DVI monitors via the use of a splitter
>cable, even though they only have one DVI out. Do they all support
>that? I never see it say so in the specs...

I don't know how the graphics card will handle two different monitor ID
signals, but assuming you can get it to output a correct signal, there's no
reason why you can't split that signal and send it to two devices.

For analog, you're going to lose quality - how much depends on the quality and
length of the cables. For digital, either the signal is intact or it isn't -
rather than losing quality, you might lose connectivity, maybe intermittently.

I expect there are devices out there that intelligently split the signal,
amplifying as necessary. But I also expect such devices to be at least as
expensive as a new graphics card with two DVI connectors.
--
- Mike

Ignore the Python in me to send e-mail.

Peter Huebner

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May 10, 2008, 5:51:54 PM5/10/08
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In article <4007bb5a-9f1c-4b17-a3f2-60abf3b6f3c5
@y21g2000hsf.googlegroups.com>, dter...@hotmail.com says...

Look at a picture of the card. If it has two dvi connectors
then it will feed two monitors, it's as easy as that.

-P.

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Bob Myers

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May 10, 2008, 9:37:56 PM5/10/08
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<dter...@hotmail.com> wrote in message
news:4007bb5a-9f1c-4b17...@y21g2000hsf.googlegroups.com...

The DVI connector supports both single- and dual-link
forms of the digital interface it uses (called "TMDS").
It's possible that some cards could provide two separate
single-link outputs via the connector, but this is a non-
standard use. (Not that the DVI standard is all that solid
in the first place...) You can also, of course, simply
split a given output, preferably with an active splitter
(i.e., one which takes the digital signal and duplicates
it via a buffer).

Bob M.


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