<div dir="ltr">The place I usually go for cables is <a href="http://monoprice.com">monoprice.com</a>. They don't mention the HDMI certification level on any of the cables that I randomly clicked on, but they do clearly state "supports 4K @60Hz" on some of them. Unfortunately there is no way to filter only the cables in that category. The information is hidden in the description so you have to click them one-by-one.<div><br></div><div>Interestingly, it also appears that long HDMI cable lengths are possible (100+ feet) because the cable makes appear to be embedding some kind of extender chip into the cables themselves.</div><div><br></div><div>John</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Sep 9, 2015 at 2:01 PM, Trevor Cordes <span dir="ltr"><<a href="mailto:trevor@tecnopolis.ca" target="_blank">trevor@tecnopolis.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Worse still, after spending another 2 hours looking into it last night,<br>
I found that it is incredibly hard to tell what cables are what. Sites<br>
say that legally speaking, the HDMI group doesn't let cable vendors<br>
label their cables as "1.4" or "2.0". They are only allowed to say<br>
"High Speed HDMI", which is near useless in telling you anything.<br>
<br>
It turns out that it's not just rez but refresh that has to be factored<br>
into your cable purchase. I guess that's a holdover from HDMI's TV<br>
focus. TV's are fine with 30fps. Most computer people need 60fps.<br>
<br>
For instance, you *need* HDMI 2.0 to do 4k@60. But they can't label<br>
their cable as "2.0", so WTF are you supposed to do?<br>
<br>
I talked with my reseller rep at Startech and they said none of their<br>
HDMI cables are 2.0 even though they loudly exclaim "ultra hd!" and<br>
"4k!". He said they are all HDMI 1.4 or 4k@30. Luckily 1.4 will also<br>
do my required 2560x1440@60, so in my case 1.4 is good enough.<br>
However, if I was super bleeding edge I'd be getting a 4k monitor and<br>
then be stuck having to find a 2.0 cable amongst these wacky labeling<br>
rules.<br>
<br>
C2G's HDMI cables claim to do 4k@60, so there's a safe option... unless<br>
they are lying!<br>
<br>
P.S. Michael is almost certainly right when he said at the meeting that<br>
you have to manually add the 2560x1440 rez into xrandr once you have<br>
the correct components in place.<br>
<br>
P.P.S. It looks like 2560x1440 is doable with HDMI, just with so many<br>
caveats most people can't get it working and switch to DP. I've picked<br>
out a cable and a new inexpensive VC that should allow me to get this<br>
working. (And vdpau, which I've wanted for a while...) I will report<br>
back in a few weeks.<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">John Lange<br><a href="http://www.johnlange.ca" target="_blank">www.johnlange.ca</a></div>
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