Need help going full 4k....


Novice Member
Hey guys,
Long time reader, first time poster. Just bought a Vizio M70-C3 and love the picture with the built-in 4k apps, but now I want the whole system to go 4k. I have an Onkyo TX-NR616. I know that I need to run the HDMI (18 Gbs) from the Out Main to the HDMI 5 spot in order to get 4k @ 60 Hz, but do I need a 4k capable HDMI from my roku 4 to the receiver as well, or will it up convert from a standard 10 Gbs cable? Any other settings I need to tweak or other cables I need to grab. Thanks for the help. I have exhausted the search option in the forums but am still scratching my head a little.


Distinguished Member
You do not need new HDMI cables for UHD 4K signals. All that is required is that the HDMI cable be rated HIGH SPEED (category 2). Existing High Speed HDMI Cables will support the new higher bandwidths up to 18Gbps.

HDMI 2.0 specification defined a new, more efficient signaling method, for speeds above HDMI version 1.4b limits (10.2Gbps) to allow higher bandwidths (up to 18Gbps) over existing High Speed HDMI Cables. HDMI 2.0 features such as the conveyance of [email protected]/60 will work with existing High Speed HDMI cables.

Also note that your receiver pre dates HDMI version 2.0 and therefore will not be able to passthrough native UHD content. The reason for this is that you need HDCP 2.2 compliance to satisfy the requirements for true UHD 4K that will be used for all future UHD broadcasts and Blu-ray releases. Neither will your receiver passthrough [email protected]/60.
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