dvi-d to vga..

[Lucian28]

hi i have a 7790 vc and a monitor that only have vga input can a product like this work for me?
http://www.cdrking.com/?mod=products&type=view&sid=2859&main=4 ..

 

[thismafiaguy]

Yes, that will be just the thing you need, if your 7790 didn't come with one of those in the box. These things are brilliant for using older hardware.

 

[Lucian28]

ok thanks man

 

[huilun02]

My friend, that appears to be a DVI-D to VGA passive adapter. It will never work. Because DVI-D is a digital-only output and cannot be converted to an analog signal without an active adapter.

You will need something like this
http://www.ebay.com/itm/StarTech-Model-DVI2VGAE-DVI-D-to-VGA-Active-Converter-Cable-M-F-/380715847865
Though you might want to find it at a local PC store

 

[Lucian28]

ah i see, what about the hdmi to vga passive is it possible?

 

[huilun02]

The only passive adapter that will work is DVI-I to VGA. But to use one your video card needs to have a DVI-I port.

Here is a picture, all three on the left are DVI-I ports
http://www.overclock.net/image/id/4079839

Get the adapter for the specific port you have
DVI-I Dual Link http://img.ebyrcdn.net/116909-123974-800.jpg
DVI-I Single Link http://t0.gstatic.com/images?q=tbn:ANd9GcTbyCOVmGN0IcFHnP8HpaO6YDBqQ_r6Xnpfecn3T0p4oUXTJTmP
DVI-A http://www.playtool.com/pages/dvicompat/vgaadapter.jpg

 

[Lucian28]

ok now that helps, =) but leads me to another question, are there any quality difference in the display if i use the dvi-i to vga rather than direct dvi-d or hdmi output of my video card, luckily my vc has one dvi-i.. i hope there is no difference in the quality..

 

[bystander]

My friend, that appears to be a DVI-D to VGA passive adapter. It will never work. Because DVI-D is a digital-only output and cannot be converted to an analog signal without an active adapter.

You will need something like this
http://www.ebay.com/itm/StarTech-Model-DVI2VGAE-DVI-D-to-VGA-Active-Converter-Cable-M-F-/380715847865
Though you might want to find it at a local PC store

I curious, if that adapter doesn't work, what does it do? Why would an adapter that can't work be manufactured?

 

[huilun02]

For the same reason counterfeit items are made I guess.

The only way to make an analog signal from a purely digital signal, is through an active converter.

 

[jimthenagual]

'pick as the solution' was removed and reselected at request of original poster.

 

[thismafiaguy]

Lucian, which brand and model of 7790 do you have?

All the 7790's that I found have DVI-I output. The adapter you linked to in the original post does not convert digital signal to analog, but it will not need to if your 7790 has DVI-I output, which is both digital AND analog.

 

[Lucian28]

Lucian, which brand and model of 7790 do you have?

All the 7790's that I found have DVI-I output. The adapter you linked to in the original post does not convert digital signal to analog, but it will not need to if your 7790 has DVI-I output, which is both digital AND analog.

sapphire 7790 dual x oc, yes i has a DVI-I.. so i guess i only need a DVI-I to vga right?

 

[thismafiaguy]

Yes, if it has DVI-I, there is no need to convert from digital to analog because DVI-I can work with either digital or analog, while DVI-D is digital only. In this case all you would need is a short adapter like the one you listed initially.

 

[Lucian28]

Yes, if it has DVI-I, there is no need to convert from digital to analog because DVI-I can work with either digital or analog, while DVI-D is digital only. In this case all you would need is a short adapter like the one you listed initially.

ok one last question, will there be a differrence in display quality if i use DVI-I and not the DVI-D, DVI-I vs DVI-D

 

[huilun02]

Just to warn you again... Take a good look at the adapter that you initially linked, pay attention to the area around the flat - pin on the right.

Now look at this http://upload.wikimedia.org/wikipedia/commons/6/65/DVI_pinout.svg

See what's missing? Now you know why it won't work.

As for the difference in quality between DVI-I and DVI-D, you probably won't see any difference as long as the monitor receives the digital signal. However, if you use a VGA adapter the monitor will only receive analog signals, as if your video card had a VGA port and you hook it up without any adapters.

As long as your monitor is only receiving analog signal, there can be a noticeable loss in visual quality especially at very high resolutions. 1080p and upwards you would probably want to be using full DVI or HDMI to ensure you get the best image quality. If you monitor can only accept VGA, it's resolution is probably not high enough to require anything better.





... and in case you're going to make a complete circle and ask "how do I get my monitor to receive digital signals?" The answer is simply by connecting it to the video card directly using a DVI, HDMI or DisplayPort cable.

 

[Lucian28]

Yes, that will be just the thing you need, if your 7790 didn't come with one of those in the box. These things are brilliant for using older hardware.

Just to warn you again... Take a good look at the adapter that you initially linked, pay attention to the area around the flat - pin on the right.

Now look at this http://upload.wikimedia.org/wikipedia/commons/6/65/DVI_pinout.svg

See what's missing? Now you know why it won't work.

As for the difference in quality between DVI-I and DVI-D, you probably won't see any difference as long as the monitor receives the digital signal. However, if you use a VGA adapter the monitor will only receive analog signals, as if your video card had a VGA port and you hook it up without any adapters.

As long as your monitor is only receiving analog signal, there can be a noticeable loss in visual quality especially at very high resolutions. 1080p and upwards you would probably want to be using full DVI or HDMI to ensure you get the best image quality. If you monitor can only accept VGA, it's resolution is probably not high enough to require anything better.





... and in case you're going to make a complete circle and ask "how do I get my monitor to receive digital signals?" The answer is simply by connecting it to the video card directly using a DVI, HDMI or DisplayPort cable.

thanks for the help sir, anyway im only playing @ 1440x900, i guess there will never be a noticable difference.. againg thanks for the help i appreciate it.. =)