20M HDMI Cable ??

[Speed]

By that logic you could run a HDMI cable to the moon and back and the signal will be fine.

In reality you get signal attenuation, even with a digital signal and you need to combat this with either higher grade cable or active signal repeaters. More info here.

Most likely with a 15m £10 cable you either got lucky with a good value/nice quality cable, the devices on either end of the cable are good (good error correction and sensitivity) or you aren't noticing the evidence of HDMI signal loss (artifacts like sparklies).

+1

Some very well made points there.

 

[Energize]

VGA is analogue and wont give you 1080P on your telly. So avoid that unless you don't need an HD picture.

Technically 768p is HD. Importantly however, 1080p doesn't look any better in many situations because of the viewing distance to screen size ratio.

 

[cmndr_andi]

cheers guys im going to get a 20m HDMI and give it a go, I must say on my 3 HDMI cable i have one of them being a £50 top of the range cable that a couple of people convinced me they make a difference, well i bought another off the bay for £1.20 !!! yes £1.20 as i just needed one for my surround sound (just to set it up and adjust things now and again) and out of interest tried it on my BD player............ NO DIFFERENCE between the £50 and the £1.20 cable !!!! i even got one of my mates who thinks it does make a difference showed him and asked him what one was not he could not see any difference what so ever so im a little hesitant to spend a fortune on a cable

Yea, high quality short HDMI cables are a bit of a con. Technically they will be made with higher quality components and usually feature thicker wire for lower signal loss/impedance. However at short lengths (less than 5m) these features really don't matter as even a bargain basement HDMI cable of this length will be able to transmit a 1080p@60Hz signal flawlessly (assuming the cable conforms to the HDMI design specs).

However, with the much longer lengths (eg 20m which you mentioned in the OP) then cable quality really does make a big difference if you want to receive a flawless 1080p@60Hz image.

 

[Buchanan0204]

Yea, high quality short HDMI cables are a bit of a con. Technically they will be made with higher quality components and usually feature thicker wire for lower signal loss/impedance. However at short lengths (less than 5m) these features really don't matter as even a bargain basement HDMI cable of this length will be able to transmit a 1080p@60Hz signal flawlessly (assuming the cable conforms to the HDMI design specs).

However, with the much longer lengths (eg 20m which you mentioned in the OP) then cable quality really does make a big difference if you want to receive a flawless 1080p@60Hz image.

I think your urinating into the wind Andi. Be interesting to see how the 20M cable performs.

 

[ooEy]

I am using a 20m HDMI cable I got from an auction site for £13.99 inc P+P. I use it to connect a HD5850 to a 42" TV. No issues ever.

 

[Surveyor]

I am using a 20m HDMI cable I got from an auction site for £13.99 inc P+P. I use it to connect a HD5850 to a 42" TV. No issues ever.

And a 42" TV could be 1366x768 resolution, or less, so the size of your TV alone doesn't really add much to the discussion.

 

[Randall8686]

OK Well thanks all for the Advice, I think i will try a 20m HDMI cable i will get a reaonable one not cheapest. I want to use if for racing games and flight sims it will be a 1080p
I will report back once i have the cable and hopefully it will be OK. if not i will just send the cable back as not fit for purpose.

 

[Schizo]

I'll be surprised if a standard cable works over 20m to be honest. I had problems with a 7m DVI cable leading to sparklies at higher resolutions.

ive had this as well.

these cheap extra long hdmi cables dont work.

mine was only 20 feet and as jokester said "it leads to sparklies"

 

[ooEy]

And a 42" TV could be 1366x768 resolution, or less, so the size of your TV alone doesn't really add much to the discussion.

Ok a 42" 1080p TV (I use it for casual "console style" gaming ie FIFa, Dirt 3, Mafia II etc with a wireless controller)

 

[Snograt]

What cmndr andi is saying (with an amazing amount of patience, given all the nay-sayers) is that, yes, HDMI is just " a load of 1s and 0s" but, with signal drop at longer lengths, there will be times when those 1s and 0s just won't get through.

Sure, you can buy a 10M+ cheapo cable and get lucky, like some correspondents here - but don't expect to.

 

[panyan]

And a 42" TV could be 1366x768 resolution, or less, so the size of your TV alone doesn't really add much to the discussion.

i thought if it was hdmi it was automatically 1080p? ir is that just on newer tellys?

 

[cmndr_andi]

HDMI is the standard digital input for all modern "HDTVs" including "HD ready" or 720p (1366x768) models. 1080p "Full HD" TVs also use a HDMI connection as it has sufficient bandwidth to transfer a 1080p@60Hz, however the use of a HDMI connection does not necessarily mean the TV will be 1080p.

 

[Surveyor]

i thought if it was hdmi it was automatically 1080p? ir is that just on newer tellys?

A HDMI cable can be used for any resolution up to the maximum bandwidth it will support.

The device sending the signal will determine what is transmitted and that may, or may not, be 1080p.

You could use a HDMI cable with 640x480 resolution if you so wished.

Just because it's HDMI doesn't automatically make it 1080p.

And even if you were sending a 1080p signal the device receiving it may not be 1080p, such as some older televisions.

 

[Rexton]

It will be fine, I'd be surprised if anyone could notice the difference between a 30cm HDMI and a 20m one. At least I certainly never have.