Forum Thread

HDMI signal troubles with 4k tv

EpicBob 1,934 101 March 20, 2016 at 09:55 PM
I have an hdmi cable plugged into a GTX 980ti video card and an hdmi 2.0 port on a 4k tv. I have it set for 2160p at 60hz, but sometimes the screen goes black for a second (it has nothing to do with the pc's power settings, as I have it set to never turn off the PC or display). I tried purchasing an Amazon brand hdmi 2.0 cable thinking it may have been a faulty cable. With the new cable, it's even worse. The screen goes black more frequently and sometimes there's a horrible flicker. I tried hooking it up to port 3 instead thinking my hdmi port 1 could be bad and it would still go black (but at least not flicker this time). Do you think it's my cables that are the issue, and if so, does anyone have a recommendation for a cable that'll display 2160p at 60hz? If not, what do you think is wrong?

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#2
No need to start a whole new thread: http://slickdeals.net/f/8578574-are-hdmi-2-0-cable-necessary-for-4k-60hz-4-4-4?v=1&src=SiteSearch

It's hard to say for sure, but it sounds like from a signal integrity perspective the eye is collapsing. https://en.wikipedia.org/wiki/Eye_pattern
You could try a different cable, I'd recommend trying a relatively high end "high speed" cable from a local retailer. Return it if it isn't any better. There could also be some issue with the design of your particular tv or video card that makes it harder to deliver 4k content. Physical connection issues and interference from other devices is also a possibility.

Experiment with different video settings like lowering the refresh rate or dropping the color depth a little to see if you can get a stable picture. Also test if the your setup is sable at 1080p (same cable, port of tv, video card, cable routing, etc).
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Last edited by jkee March 20, 2016 at 11:35 PM
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