1440p Display with Single Link DVI cord

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EricJohn2004

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Feb 13, 2014
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I just got a new 27 inch 1080p IPS Gloss Dell display, it's beautiful. And it has a single link DVI cable because supposedly that's all it needs. Well, in order to help with some of the jaggies and because I have a beast of a graphics card(GTX780), I run my games at 1440p through the Nvidia control panel by setting a custom resolution. And to me, it makes the games look a little better, almost like my display is 1440p itself.

My question is, aren't you suppose to have a dual link DVI cord for 1440p images? I know this is the case, are my images not looking as good as they should right now because I'm not using a dual link DVI cable?

In other words, what happens when you use a single link DVI cable for 1440p?

Will the images just not look as crisp or what? Do I need to get a dual link DVI cable to get the best 1440p picture?
 
Solution
k1114
It makes no difference if you have single or dual link. Single link does not have enough bandwidth for 1440p/60 so some simple reasoning would conclude it is not transmitting 1440p/60. The gpu is outputting 1080p, the monitor receives 1080p, it shows 1080p. Aa is nice but it's still 1080p and not 1440p. I understand the comment since the difference is small and may not be noticeable and worth it for some people. The lagginess you explained from the 1440p monitor could have been ghosting.
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k1114

k1114

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May 2, 2010
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A larger res being downscaled is exactly how ssaa works and is the most taxing type of aa; the reason why it isn't used. You don't seem to have fps issues for whatever game you are playing but if you do, it's much more efficient to just turn on msaa or some other aa.
 
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EricJohn2004

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Feb 13, 2014
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Some of the games I'm playing do not have MSAA or SSAA. So I use this instead. Being that I don't game at 120Hz, I have TONS of GPU horse power just left sitting idle. So I figured I'd use it.

And yes, I know running 1440p like this won't look as good as 1440p. But it looks damn close. I actually went from having a 1440p monitor down to a 1080p monitor. My games looked laggy on the 1440p monitor. IDK why? But now that I have 1080p IPS Gloss, the image quality coming from a 1440p monitor isn't that much worse, it's hardly noticable. Afterall, 1080p IPS Gloss is the best kind of 1080p you can get.

Now, my question was, since I'm using a single link DVI, am I getting a worse picture because of it? Will it help to get a dual link DVI in this situation? Can any of you answer that specific question?
 
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EricJohn2004

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Feb 13, 2014
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It seems like you are saying that it doesn't matter if I have a single link or dual link? When I read up on how to do this(make my monitor 1440p using Nvidia control panel), the website said that I'd need a dual link DVI. Are you saying they were wrong?



 
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k1114

k1114

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May 2, 2010
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It makes no difference if you have single or dual link. Single link does not have enough bandwidth for 1440p/60 so some simple reasoning would conclude it is not transmitting 1440p/60. The gpu is outputting 1080p, the monitor receives 1080p, it shows 1080p. Aa is nice but it's still 1080p and not 1440p. I understand the comment since the difference is small and may not be noticeable and worth it for some people. The lagginess you explained from the 1440p monitor could have been ghosting.
 
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