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Any quality differences in HDMI length?

post #1 of 10
Thread Starter 

I am using a 15 ft. for my PC connected to my GTX 580 but since I have put my new desk up, all I now need is a 5 ft. I read that HDMI did it's best at 5 feet and under but I know few use it at that length. Would I get any benefits/clarity by getting a smaller cable?

post #2 of 10
The way I understand it is that since it's a digital signal the length doesn't really matter. If this was an analog signal like VGA, the length could potentially matter, but I assume the line would have to be dozens of feet long to make any discernible difference.
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post #3 of 10
Quote:
Originally Posted by tehmaggot View Post

The way I understand it, is that It's a digital signal so length doesn't really matter. If this was an analog signal like VGA, the length could potentially matter, but I assume the line would have to be dozens of feet long to make any discernible difference.

Wrong in a way.

With digital signal, it is either you get it or you don't. In this case having cheap HDMI cable too long can cause you to not get any signal at all. There will be no variation in terms of video quality.

As long as you are using quality HDMI cable, you are okay (unless you run outrageous 200 ft length).
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post #4 of 10
Quote:
Originally Posted by trumpet-205 View Post

Wrong in a way.
With digital signal, it is either you get it or you don't. In this case having cheap HDMI cable too long can cause you to not get any signal at all. There will be no variation in terms of video quality.
As long as you are using quality HDMI cable, you are okay (unless you run outrageous 200 ft length).

That's essentially what I was going for, I figure I just worded it improperly redface.gif

Anyway, as long as the cable is long enough to suit your needs and it works, you're golden.
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post #5 of 10
generally the rule is 50 feet and above get a quality name brand. Great article about it here HDMI

Quote:
In practical terms, today, for distances 50 feet and shorter, even economical HDMI cables are usually reliable at 720p, 1080i and (though this is less consistently so) 1080p. For very short runs--all those 3 and 6 foot cables out there in the world, at least when not being used as part of a much longer signal chain--it's best not to worry about it at all. But for those long runs, the future is still very unclear. Low-cost 50-foot cables which are near their performance limit at 1080p today may not work with 16-bit color 1080p tomorrow.

If you're in the longer-than-50-foot category, it gets dicier. We have had good consistent results with the Series-1 cable out to 100 feet, with reports of no trouble in the great majority of installations. Cable quality starts to be a real concern at these distances, and performance always is hard to predict, especially because the cable that works on one source/display pair may not work on another. There is, unfortunately, no really good way to know what will work without plugging it in.
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post #6 of 10
Beyond 17-18 feet it will start failing at high resolution HD video tests, so you would need to start considering a signal repeater. But 15 is fine for typical gaming use.
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post #7 of 10
Thread Starter 
Quote:
Originally Posted by astrallite View Post

Beyond 17-18 feet it will start failing at high resolution HD video tests, so you would need to start considering a signal repeater. But 15 is fine for typical gaming use.


What about 1080p Blu-rays? Is that alright too?

post #8 of 10
I had a computer hooked up to my 32" LCD TV for a while using a 5m plain HDMI cable. It was going through a powered HDMI switch to switch with something else. I had no problems at 1080p, though not sure on blu-ray. thumb.gif
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post #9 of 10
Quote:
Originally Posted by Deverica Wolf View Post



What about 1080p Blu-rays? Is that alright too?

Yes 15 feet is fine. It will start to fail the most stringent of video tests at around 15 feet but this is on unrealistic material. 25 feet is about the upper limit to retain the full picture of currently available 1080p content.

700

http://www.audioholics.com/education/cables/long-hdmi-cable-bench-tests
Edited by astrallite - 2/6/12 at 10:05pm
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post #10 of 10
I've seen people use 32 feet with no issue. The guy runs 12 of them from a server room into monitors for gaming. That said, if you're looking for best quality, probably need to pay a bit more if you need it to be guaranteed.
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