HDMI Supported Resolutions Confusion

Ghøst · 18 Oct 2012 at 18:49

I need to run a 15 meter cable between PC (MSI GTX 680 oc) in the living room & a 27" 1440 IPS (Dell/Hasro) screen in the music room.

Initially I planned to run a HDMI cable as opposed to a DVI as HDMI is a cheaper option at these lengths & it also carries a digital audio signal.

From what I've read online the supported resolutions of HDMI is determined by the manufacturer of the devices & not the HDMI standard itself.

Can anyone help me determine whether or not my GPU & Screen will work with HDMI & 1440 resolution or will I be capped at 1080 & have to go the DVI route?

Thanks in advance for your time as always.

Ghøst · 18 Oct 2012 at 19:04

I just read the 2012 TFT sticky which seems to suggest that HDMI does not have enough bandwidth to deliver the full 1440 signal but there are conflicting reports online which advise that HDMI 1.3 can support upto 2560x1600.

eg: http://superuser.com/questions/119755/hdmi-with-resolution-2560-x-1440-possible

The more I read the more confused I'm getting atm.

topdog@OC · 18 Oct 2012 at 19:05

HDMI 1440 should be fine to any 60Hz display. It's 120Hz monitors that can struggle with HDMI bandwidth above 1080p.

Edit: At least from a pure bandwidth perspective, individual monitor limitations notwithstanding.

Ghøst · 18 Oct 2012 at 19:11

topdog@OC said:
HDMI 1440 should be fine to any 60Hz display.

Thanks, if someone could test this & report back, that'd be great.

james_2k · 18 Oct 2012 at 23:32

when i got an asus monitor which is 1440p, could only select 1080p when using hdmi.

Surveyor · 19 Oct 2012 at 00:28

Unfortunately you aren't going to get 2560x1440 with HDMI even at 60Hz.

Ghøst · 19 Oct 2012 at 09:30

Thanks again guys guess it's time to try and source a 15 meter DVI cable neither overclockers or the other place have them......

monitorsgrrrrrr · 19 Oct 2012 at 11:03

HDMI 1.3 and 1.4 does support 2560x1440
http://en.wikipedia.org/wiki/HDMI

james_2k · 19 Oct 2012 at 11:19

well I tested it on an hdmi 1.4 source with the monitor which supposedly also supports it and I didnt get any options for 1440p

Ghøst · 19 Oct 2012 at 11:27

Too much conflicting opinion on the HDMI issue so have ordered the Dell U2713HM from overclockers & a DVI cable from elsewhere. Both items being delivered tomorrow I will test the HDMI thing myself to see if it either supports those higher resolutions out of the box or can be forced by by pointing xorg.conf to a custom EDID file as suggested on another forum.

Surveyor · 19 Oct 2012 at 12:00

monitorsgrrrrrr said:
HDMI 1.3 and 1.4 does support 2560x1440
http://en.wikipedia.org/wiki/HDMI

Theoretically they do but in practice that resolution isn't supported via HDMI on current monitors.

Axeia · 20 Oct 2012 at 00:19

When I looked into this over a year ago I found out that resolutions over 1920x1200 were only supported via a HDMI connector not found on any consumer electronics. Videocards with the exception of the AMD Radeon 7xxx series also didn't support resolutions over 1920x1200 via HDMI (NVIDIA's latest generation wasn't out back then).

Also distances as big as 15m are problematic, anything over 5m is problematic tbh - so 3 times that is very likely to give you signal strength issues. Make sure to get a very well shielded cable but I'm fairly sure that you wil need an active solution that amplifies the signal which most likely is ridiculously expensive.

Ghøst · 20 Oct 2012 at 12:41

Thanks guys everything delivered a short while ago & working beautifully with 15m DVI cable.

Now to find a nice cavity wall mounting solution, anyone has experience mounting a screen of this nature (Dell 2713HM) on a plaster board wall?