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I purchased a Samsung QLED TV and it has three HDMI 2.1 sockets.  For best 4K HDR picture I should be using HMI 2.1 cable to attach to the Telus 4K box.  Is the outlet for the HDMI cable on the Arris box HDMI 2.1?


Community Power User
Community Power User

HDMI 2.1 is backwards compatible. It is a standard that just went into use this year so not a lot of devices have it yet. It appears to be limited to high end TVs currently. I would suspect the Arris 4K box is only HDMI 2.0 and it should work fine.


HDMI 2.1 adds improved performance, though for regular TV you're not likely going to ever use that currently since I don't know of any 4K channels that broadcast at 60fps. If you get the upcoming PS5 or the new Xbox, those are supposed to be HDMI 2.1 also so they should be able to offer much higher frame rates compared to the current gen consoles.

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Nighthawk, I know HDMI 2.1 is backwards compatible. I have an HDMI 2.0 hooked up to the Telus PVR.   Reason I asked was that Telus offers Travel4kHDR and the picture isn't even up to my HD channels for clarity and color.. looks like faded colors. 

Thanks for the tech info Nighthawk.

Community Power User
Community Power User

I believe the Arris box is HDMI 2.0a




To see what's what with the different versions of HDMI: