Third monitor in my new setup keeps turning off and on again like it's losing signal

[UberTiger]

I bought a 3rd monitor for a triple monitor setup last week and I also bought a new graphics card so that I could run it.

It's 3 of the 27" DGM 1440x2560 monitors and the new graphics card is a GIGABYTE RADEON R9 270 WINDFORCE 2X OC BF4 EDITION 2GB GDDR

I was planning on using two of the DVI ports and the hdmi port but I don't think that's possible. I think it's because one of the DVI ports and the HDMI port actually share the same connection?

So I bought a Displayport cable instead and now windows allows me to use all 3 monitors.

My problem is the displayport connected one keeps blacking out for a couple of seconds at a time. It may not do it for an hour, then do it a few times within a few minutes.

It's really frustrating. Has anyone else experience this? How can I tell what the issue is?

I got a windows error after it turned off one time, but I can't remember exactly what it was. I think it was a displayport link error.

This post seems to think a cable replacement might fix it.

This is the cable I'm using, says it will satisfy my resolution, I'd be suprised if OcUK didn't stock compliant cables?

 

[UberTiger]

Yeah, I think I read that. Which is why I'm trying to use use direct dvi to dvi, hdmi to dmi, and displayport to displayport connections on the mointors, which means I haven't need to buy any adapters.

But I'm not sure if this is a cable issue or a graphics card issue? If it's a cable issue should I get one from elsewhere and ensure it's of the correct standard (1.2 the newest?) Problem is most sellers don't state the spec their cable is manufactured to. Or do I get another one from OcUK and hope it's just a dodgy one that I have?