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DVI to VGA

rudy

rudy

[H]F Junkie
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Apr 4, 2004
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I have a radeon 5670 with outputs for DVI, HDMI, DP
I want to run it 15 feet over DVI to a monitor which only accepts a VGA or BNC signal.
I did not want to buy a long vga cable since its a legacy format so I purchased a beefy 15 food DVI cord from monoprice.com.

I cannot get this to work I have a DVI-Cable -> DVI>VGA adapter -> monitor setup.

I have tried swapping dvi cables with a shorter one and it still does not work. I have succefully used the long DVI cable directly to a monitor which supports DVI input.

Is it not possible to convert DVI to vga? Or is there a setting or something I need to enable.
 
It might just not work with your monitor.

I have never tried a DVI cable to vga adapter, though in theory it should work.

I do know that the DVI output-vga cable adapters should work fine though.
 
If you're going to convert DVI to VGA with just a cable and DVI-VGA adapter, the adapter has to be connected directly to the card, or the cable needs to have the DVI-I pins (as in this). Most DVI cables don't have the analog pins, for obvious reasons.

Obviously, if you go with a DVI-VGA adapter connected directly to the card, you would need a VGA cable and not a DVI cable.
 
OK this is the problem my cable is DVI-D man I thought purchasing the nicer cable from monoprice I would have had them all. Looks like I need to return the whole order and it sucks cause I ran this cable through a wall now I will need to fish it again. It sucks more because this was a total fail order every thing I got was wrong and I do not see that monoprice has a long Dual Link DVI-I cable.

I need about 15 feet could a VGA cable do that? Could I bridge a couple together I really hate to buy another VGA cable.
 
i have a 25ft vga cable that works great. you can connect them together but youd need a vga male-male adapter. id just return the dvi cable and get a vga cable unless youre sure that you want to use dvi in the future. a long dual link dvi cable sounds expensive. just get a vga cable on ebay for cheap to use until you upgrade your setup.
 
You don't need Dual Link DVI-I, just Single Link DVI-I would work. However, I do think finding a DVI cable with the analog pins will be hard and/or expensive. Yes, you can piece together VGA cables. Just bear in mind that the quality of the signal degrades with distance and connecting points. One long cable would give a better picture than multiple short cables bridged together.

Edit: Pricey, but not hard to find.
 
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If you're running VGA on the other end, monoprice has a 35' cable for $10 and a $100 cable for $20ish. Unless someone can turn up a cheap DVI-I cable doing this and then swapping it for a DVI-D/HDMI/DP/Lightpeak/etc cable in the future is probably the cheaper option.
 
Cheap is one factor but having something I have a chance of ever using in the future is another option. I found Dual link dvi-i cables for 20$ at newegg so i will just buy it there unless someone tells me this will not work http://www.newegg.com/Product/Product.aspx?Item=N82E16812270318 . I think I will need dual link in the future which is why I do not want to just opt for a standard dvi-i cable.

I have a bunch of vga cables too bad they are all 6 feet, I really hate to buy any more vga cables. Once all my CRTs die and I am forced to buy the LCD garbage I will not need the VGA cables anymore.
 
Run a VGA cable. You gain nothing by using a long DVI cable, since all the adapter is doing is passing through to the pins on the cable. Running VGA 10 feet is literally the exact same as running DVI 10 feet and then using the VGA adapter. In both cases you have an analog signal from the video card traveling 10 feet.
 
If your monitor is VGA, you'll still need an adapter that changes the male DVI-I cable end to male VGA so that it will plug into the monitor. It may or may not work - you'll have to try it and find out, but at least you have a chance since the analog signal has some wires inside the cable to make it from the video card to the monitor - something the DVI cable you have now does not provide.
 
Ya I already have that adapter this posted started with me trying to figure out why it did not work.

Also does anyone else think newegg picks the stupidest categories for filtering. There are certain common sizes for items and newegg always seems to pick ranges that include 2 large sizes.
 
rudy said:
Ya I already have that adapter this posted started with me trying to figure out why it did not work.....
Click to expand...
Cool. I would've thought that if the cable end didn't have the analog receptacles, the adapter wouldn't even plug into it. If the adapter doesn't have those pins on the DVI side, it still doesn't have a chance of working.

+1 for just using a 15' VGA cable. Even though VGA may be "legacy", there are plenty of instances where it is "good enough".
 
I don't understand your insistence on a DVI cable for this application.

When you convert DVI-I to VGA, you've basically just taken a long DVI cable and converted it into a long VGA cable. It's not like the DVI to VGA converter changes the signal, it just changes the interface. You still have an analog signal going through the DVI cable...
 
I do not understand why it is so hard for you to understand that I am buying something for future proofing. As I said above I fished this through a wall, through spray in insulation, it was an outside wall so it was hard to do, this old CRT monitor could die any day and when it does I will be forced to replace it with something that probably has a more modern format such as DVI, HDMI, or DP. The dvi cable as I understand it is a good intermediate cable that can be adapted to every one of those formats.

Same reason I insist on dual link DVI. If I have certain displays that can handle higher throughput a single link DVI may not cut it. I like fast displays which is why I have alot of CRTs around and I like High resolution which is why they are all 21" or greater in size. So whatever displays I pick in the future may be 120hz and at least 1080p. Probably higher resolution. The way I see it if I have all the wires possible then I have a pretty good chance of not needing run a new cable through the wall.
 
rudy said:
I do not understand why it is so hard for you to understand that I am buying something for future proofing. As I said above I fished this through a wall, through spray in insulation, it was an outside wall so it was hard to do, this old CRT monitor could die any day and when it does I will be forced to replace it with something that probably has a more modern format such as DVI, HDMI, or DP. The dvi cable as I understand it is a good intermediate cable that can be adapted to every one of those formats.

Same reason I insist on dual link DVI. If I have certain displays that can handle higher throughput a single link DVI may not cut it. I like fast displays which is why I have alot of CRTs around and I like High resolution which is why they are all 21" or greater in size. So whatever displays I pick in the future may be 120hz and at least 1080p. Probably higher resolution. The way I see it if I have all the wires possible then I have a pretty good chance of not needing run a new cable through the wall.
Click to expand...

if you are future proofing you should put some display port or hdmi cables in the wall, or make it easy for you to swap the cables as needed. otherwise you may find yourself going dp -> dvi -> dp in the future which may have some problems.

also if you do it right, fishing another cable through the wall should be easy. this should't be a big deal, and you should have made sure your poorly selected cables worked before sticking them in the wall anyway.
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Guys, WTF? He's saying he wants to buy a DVI cable so that he can still use the cable later when he completely dumps VGA. A DVI-I cable is correct for that case. DVI-D is not. Unfortunately Monoprice is out of stock of DVI-I cables.
 
If you want to future-proof your setup, I second the suggestion that you run a DisplayPort cable.

You can then use cheap adapters ($15 for female-female DP, plus $10 for passive single-link DVI/HDMI, or $30 for VGA) to connect to legacy interfaces.
 
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