Difference in quality between DVI, HDMI, and Display Port

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PowerHaus930 2013. okt. 1., 21:57

I was wondering what is the difference in quality is between DVI-I, DVI-D, HDMI, and Display Port connections? I have a monitor right now that only has VGA and DVI connections on it and I use a DVI-D cable. My GPU has DVI, HDMI, and Display Port outputs. I was wondering if I had three monitors using the three different outputs would I be able to tell the difference in quality between the three connections? As far as I know HDMI is the best quality but i'm not sure how the others rank. Thanks

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Spyhop 2013. okt. 1., 22:00

There's no difference in video quality between the 3. There's bandwidth differences, none of which matter for common resolutions.

PowerHaus930 2013. okt. 1., 22:28

So I wouldn't get any better picture quality if I upgraded to a monitor with an HDMI input?

Spyhop 2013. okt. 1., 22:42

Well, a better monitor than whatever you have now would certainly yield better picture quality. But it would have nothing to do with the HDMI. The major difference between DVI and HDMI is that HDMI carries audio.

Veristä mössöä 2013. okt. 1., 23:23

If you have ATI brand card, one monitor has to be connected to displayport in order to have three monitors connected.

I would prefer DP anyways if monitors support it directly. Slimmest cabels ;)

But yeah, no difference in image quality.

Legutóbb szerkesztette: Veristä mössöä; 2013. okt. 1., 23:23

Long Ago [Linux] 2013. okt. 2., 20:08

DVI digital and HDMI are same video signal. The only difference between those and VGA is that VGA "might" be less automatic and require some adjustment to match DVI and HDMI.

Do not have and never used anything with DP.

Spyhop 2013. okt. 2., 21:52

Not true. VGA is analog. Potentially much worse quality than anything digital (DVI, HDMI, Displayport)

Space Monkey 2013. okt. 3., 5:29

DisplayPort is technically superior to HDMI and DVI since it offers more bandwidth and is more flexible in terms of implementation. I personally use DP for my monitor since I have it, and I leave the HDMI and DVI connectors for other devices. In common resolutions, it will be difficult to tell a real difference between the three, though at extreme resolutions eg. 4K, DP has a significant advantage of being able to drive 4K @ 60Hz instead of HDMI's 30Hz. DP also supports multi-streaming which allows you to run 2 monitors off a single DP connection. HDMI is only more popular than DP...but it is not better. Many HDMI implementations in TV's actually suffer from Latency, (which is why many TV's offer a game mode).

Spyhop 2013. okt. 3., 7:57

"In common resolutions, it will be difficult to tell a real difference between the three,"

No, it will be completely impossible to tell the difference, since there wouldn't be any. All 3 are ostensibly data cables. Your monitor receives the data in time or it doesn't.

It's true DVI and HDMI don't have the bandwidth to handle 4K, though. But HDMI 2.0 will.

Dr. Koks 2015. febr. 19., 0:29

Update, since this still comes up as one of the top pages on google and some info here is incorrect/outdated:

1. HDMI 2.0 now supports 4k @ 60p.
2. There is absolutely ZERO difference in quality of supported resolutions between dp/dvi/hdmi.
3. Latency of TVs has nothing to do with "HDMI implementation", but is related to various "improvement/smoothing/etc." algorithms that are used on the TV picture (since for TV input lag does not matter). Game mode turns all that off, again, nothing to do with HDMI.

Cheers

mirisbowring 2015. febr. 19., 0:31

Space Monkey eredeti hozzászólása:
DP also supports multi-streaming which allows you to run 2 monitors off a single DP connection.

no...
you can connect three monitors on a single DP Output...

#10

mirisbowring 2015. febr. 19., 0:31

King of KS eredeti hozzászólása:
Update, since this still comes up as one of the top pages on google and some info here is incorrect/outdated:

1. HDMI 2.0 now supports 4k @ 60p.
2. There is absolutely ZERO difference in quality of supported resolutions between dp/dvi/hdmi.
3. Latency of TVs has nothing to do with "HDMI implementation", but is related to various "improvement/smoothing/etc." algorithms that are used on the TV picture (since for TV input lag does not matter). Game mode turns all that off, again, nothing to do with HDMI.

Cheers

DVI doesn't support 4k

#11

Sir Dookface McFerretballs 2015. febr. 19., 1:52

HDMI is stuck at 60hz and 1080p but carries internet and sound as well as video signals. Displayport can do everything HDMI can and better I believe 4k resolutions and much higher refresh rates as well, and dvi is old and only old people use it. lol

This video should likely explain it a bit better:

http://youtu.be/xMVDejZH4kw

#12