Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Do long DVI extension cables degrade video quality?

Do long DVI extension cables degrade video quality?

Forum Graphic & Displays : Graphics Cards - Do long DVI extension cables degrade video quality?

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jenebrad   07-10-2009 at 06:34:12 AM


Hi,

Do long DVI extension cables degrade the video quality?

This is a gaming + movie box.


thanks!

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ct1615   07-10-2009 at 06:39:10 AM
- 0 +

yes studies show cables degrade video quality at around 50ft, anything under that and you are fine. Don't fall for gimmick cables and such.

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505090   07-10-2009 at 08:27:29 AM
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define long

any premade, decent quality cable you buy should suffice for the length it is.

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AKM880   07-10-2009 at 09:00:16 AM
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Around 50-55ft is where the signal usually degrades. I've heard this is also true for HDMI.

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dmv915   07-10-2009 at 09:18:23 AM
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I would suggest against using a long cable especially if it's a gaming machine. The more distance between the monitor and computer, the more latency you introduce.

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festerovic   07-10-2009 at 08:45:12 PM
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check out monoprice.com, they have very inexpensive cables. Cable quality/shielding is not very important as the data is digital and not very prone to interference or degradation.

A friend has 50ft HDMI from PS3 to 1080p plasma, I can't tell a difference in quality at all.

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daedalus685   07-10-2009 at 08:51:48 PM
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dmv915 wrote :

I would suggest against using a long cable especially if it's a gaming machine. The more distance between the monitor and computer, the more latency you introduce.

 

You are aware that the signal travels near the speed of light right? No cable could introduce latency because of length, the signal would attenuate to nothing long before you could notice the lag. The only reason you notice lag in a phone conversation with someone far away is that the signal must be amplified many times over which introduces the slow downs. If nanoseconds concern you I might have to call you superman.

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Message edited by daedalus685 on 07-10-2009 at 08:54:46 PM
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photonboy   07-10-2009 at 09:42:14 PM
- 0 +

"degrading"

Just to clarify, digital signals are either received 100% or not at all. There are some instances when they are right on the border line causing "sparkling."

You haven't discussed your audio solution, however. You might run into a lag issue between your video and audio.

I have a VGA and 3.5mm stereo audio cable working at 16feet between my PC and HDTV with no issues.

Reply to photonboy
gamerk316   07-11-2009 at 03:07:15 AM
- -1 +

I beleave 50ft is usaually the spec for data transmission without data loss for digital connections, although you can go longer without any issue. Beyond that, there is a risk of data corruption unless the signal is bosted first.

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blackhawk1928   07-11-2009 at 04:38:12 AM
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daedalus685 wrote :

You are aware that the signal travels near the speed of light right? No cable could introduce latency because of length, the signal would attenuate to nothing long before you could notice the lag. The only reason you notice lag in a phone conversation with someone far away is that the signal must be amplified many times over which introduces the slow downs. If nanoseconds concern you I might have to call you superman.



Agree

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