Solved PC to TV thru HDMI produce artifacts at 60hz but fine at 30

Ultimate Windows 7 ultimate 32-bit
March 16, 2015 at 22:40:22
Specs: Windows 8.1, i7 4790, 8GB
I decided to hook up my PC to my Samsung TV as a 2nd monitor, but since the distance is longer than a typical HDMI cable, I decided to link 2 HDMI cable together through an HDMI coupler (a 30 feet and a 5 feet cable).
However when hooked up (1080p@60hz, which the TV supports), the picture on the TV has these white specs and tiny white horizontal lines all over.
I've tried another pair of HDMI cables, and switched to another HDMI coupler, but same result.

But then I changed the refresh rate output to the TV to 1080P@30hz, the artifacts went away!
I wonder if it's because of the length of the cable producing signal problems, or if there's something else evil at play.
Might anyone know of anything I can try to bring it back up to 60hz without the artifact problems?


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March 17, 2015 at 10:30:18
✔ Best Answer
If the Samsung is an LCD TV then you would be better off using 60Hz. refresh rate at a lower resolution.

There are many versions of the HDMI standard. I would guess the cable needs to be rated for the required standard.

See the linked thread below for possible help. I would say it would be better to use a longer cable rather than a connector. Not all cables are created equal either.

message edited by OtheHill

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