Dual Monitors WIn 7

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cybernia_nyc

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I have a friend who wants me to set up a dual monitor system like he has at work and I'm confused. He has an HP Win 7 machine and the graphics card has a regular vga port and one that according to the specs says is a DVI-D.

I went to pick up a VGA to DVI-D adapter for the second monitor and the guy said that it wasn't possible to do that without a "converter box." That doesn't sound right. Help?


Thanks,

Bernie
 

Macboatmaster

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There are basically two issues to consider the first is - will the card or the integrated graphics - whichever it is - support TWO monitors
see here please
http://nvidia.custhelp.com/app/answers/detail/a_id/221/~/what-is-the-difference-between-dvi-i-and-dvi-d%3F


Although yours may not be Nvidia the principle is the same


So on that link
Some NVIDIA based graphics cards will look similar to Figure 2 which features a DVI-D connector as well as a VGA connector. These cards generally will only support a single display at a time, not dual monitors.


I presume the monitor in question for which you went to buy the adapter - does not have a DVI connection - on the MONITOR


Therefore if that is the case - you need to be aware that the connector I think you are talking about is the simple male DVI-D to female VGA
http://www.amazon.co.uk/DVI-D-Male-Female-Converter-Adapter/dp/B009C6LMT6


scroll down on that link and you will see what I mean

note that these products will not convert a digital signal into an analogue one or vice versa


See here
http://computer.howstuffworks.com/monitor3.htm




so in simple terms - VGA is analogue and DVI-D is digital only
If your monitor has only a VGA connection - the salesman is quite correct - it will not work
THAT is with the presumption that the port on the graphics is DVI-D and not DVI-I as the latter carries both analogue and digital


Presuming you can sort that out here is how to proceed
http://windows.microsoft.com/en-GB/windows7/work-and-play-better-with-multiple-monitors


Finally if the problem is as I think it may be you do indeed need the convertor


http://www.ebuyer.com/513562-starte...ium=products&gclid=CLqds4Kp28MCFQHKtAodMBYAuQ


or a cheaper one here

http://www.ebay.co.uk/itm/New-DVI-D...DVI2VGA-Connector-for-PC-Laptop-/191505061151

HOWEVER a note of caution
Check first that the graphics can support two monitors - otherwise you will waste money on the convertor
 

cybernia_nyc

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Thanks! I wasn't aware so much was involved. :( The way I've been reading things was that you could just hook up two monitors with no mention of the requirements you noted.

I guess if the monitor didn't come with a DVI cable I'll need the converter.

Although the specs do say this: DVI-D and VGA video ports support independent dual displays (It's an Intel card)

I guess this needs more investigating to make sure

Thanks again.

Bernie
 

valis

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you shouldn't need a converter box. If that is a factory vid card with VGA and DVI, make sure you purchase the correct adaptor for DVI and hook up a second monitor. Many people use that setup in businesses, it's not difficult to set up.

As Macboatmaster stated, if the monitor doesn't have a dvi port, you can just buy an adaptor to go from dvi to vga.
 

cybernia_nyc

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Thanks. I like that answer. :) Yes, it is a factory card with both. The port on the machine is a DVI-D, so you are saying all I need is a VGA to DVI-D adapter and not the converter? Just double checking. In what scenario would I need the converter?

Thanks,

Bernie
 

valis

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it's cheaper than a conversion box, and will most likely work. What you need looks like this.
Just make sure you get the correct one, as there are a few variations. You will need to look at both ends to make sure it is compatible.
 

Macboatmaster

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What is the make and model of the monitor that is going to be connected to the DVI-D port on the computer


If that monitor ONLY has a VGA connection then it is analogue monitor - it may still be flat screen and not the old CRT - cathode ray tube - the very bulky heavy one.


It is very unusual for me to differ with my good colleague Valis.



I wish to stress that I MAY BE WRONG - however it is my understanding that DVI-D sends only a digital signal
whereas DVI-I can send either


The connector adapter you are talking about is I think this - only an example
http://www.newegg.com/Product/Product.aspx?Item=N82E16812119261


If you read the reviews - on the third one down you will see the manufacturers response
which is
The RA-VGA-DVI-D adapter unfortunately does not do the conversion of digital to analog but it is simply an adapter to use a VGA monitor on a DVI-D connector if the signal has already been converted either by the video graphics card or converter box.
You need to check the motherboard spec - but I suspect that you will find that the VGA port transmits analogue and the DVI-D Digital.

If I am right then as I said in my first reply - that adapter plug - will not convert the signal.

HOWEVER - I stress again I may be wrong and for the cost of the adapter - perhaps the easiest way is to try it.
 

Macboatmaster

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The video input on that monitor is analogue only

Video input (Analog) Input signal
Horizontal
addressability
Vertical addressability
Clock frequency
Analog Direct Drive, 75 ohm 0.7 V
1366 pixels (max)
-
-9
768 lines (max)
135 MHz
Here is the user manual
http://support.lenovo.com/us/en/pro...2-wide-18-5-inch-lcd-monitor/?tabName=Manuals

http://download.lenovo.com/pccbbs/visuals/ls1922_usereng.pdf

The next question is - what is make and full model of the motherboard


However if the connector is definitely DVI-D then whilst I would like to check the board specs to be sure - this is the situation you face IMHO



http://en.wikipedia.org/wiki/File:DVI-VGA-Adapter.jpg
A passive DVI-to-VGA adapter. This adapter will NOT work with a DVI-D output. It requires a DVI-I or DVI-A output to get the analog signal to a VGA input (even if the adapter looks like a DVI-D). A more expensive active adapter (or converter) is required to connect DVI-D to VGA.
 

Macboatmaster

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Where did you obtain this from please
Although the specs do say this: DVI-D and VGA video ports support independent dual displays (It's an Intel card)
 
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