Do I Need a High Speed Hdmi Cable?
Cables That Are Certified as Standard Are "Tested to Reliably Transmit 1080I or 720P Video". If You Want 4K Resolution with or Without Hdr, You Need High-Speed...
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Thereof, do I need a special HDMI for 4k?
When it comes down to 4K TV, you do not need to pick up special HDMI cables. In other words, don't immediately toss out your old HDMI cables for the newest HDMI 2.0a or 2.1. The HDMI cable standard can impact color and resolution, but newer versions are not required for 4K TV.
Similarly, is there a difference between HDMI and High Speed HDMI cables? Standard-speed cables are rated to carry up to 1080i. Many standard-speed cables can probably handle 1080p, they're just not rated for it. High-speed cables can do well beyond 1080p (up to 4K, so you don't need "4K HDMI cables"), including 3D. Any high-speed cable should work with 3D and Audio Return Channel (ARC).
Keeping this in consideration, how do I know if my HDMI cable is high speed?
If you want to make sure that your HDMI cable supports Ultra HD 4K resolution, you have to look for the HDMI High Speed Logo on the cable's packing. The cable itself normally does not carry the logo but should rather read the claim “HDMI High Speed”.
Do I need in wall rated HDMI cable?
In-wall video and data cabling should be CL2 or CL3, in-wall speaker cabling should be CL3. If you are running cable through an air return it must be CMP. In commercial applications, if you are running cable between floors it must be CMR or CMP. By law all rated cables have these codes stamped on the outer jacket.
