Sign-in / Sign-up
Your question

Do long DVI extension cables degrade video quality?

Tags:
  • Graphics Cards
  • DVI
  • Video
  • Extension
  • Cable
  • Graphics
  • Product
Last response: in Graphics Cards
July 10, 2009 4:34:12 AM


Hi,

Do long DVI extension cables degrade the video quality?

This is a gaming + movie box.


thanks!

More about : long dvi extension cables degrade video quality

a c 236 U Graphics card
July 10, 2009 4:39:10 AM

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.
July 10, 2009 6:27:29 AM

define long

any premade, decent quality cable you buy should suffice for the length it is.
Related resources
July 10, 2009 7:00:16 AM

Around 50-55ft is where the signal usually degrades. I've heard this is also true for HDMI.
July 10, 2009 7:18:23 AM

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.
a b U Graphics card
July 10, 2009 6:45:12 PM

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.
a b U Graphics card
July 10, 2009 6:51:48 PM

dmv915 said:
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.
a c 280 U Graphics card
July 10, 2009 7:42:14 PM

"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.
a b U Graphics card
July 11, 2009 1:07:15 AM

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.
July 11, 2009 2:38:12 AM

daedalus685 said:
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