No, 4K TVs typically do not come with an HDMI cable in the box; you usually need to purchase one separately, as manufacturers assume you'll use existing ones or buy them based on your specific length and quality needs. While any HDMI cable will connect, for optimal 4K performance with HDR and high refresh rates, you'll need a Premium High Speed or Ultra High Speed HDMI cable, not just any old standard cable.
A standard HDMI cable that doesn't support 2160p resolution will not work for a 4K TV. In order to get all of the benefits a 4K TV offers, a 4K HDMI cable is required.
Any new digital TV should come with at least two HDMI connections, preferably three, so be sure to double-check for this in the store, prior to purchase.
Also known as HDMI category 2 cables, high-speed HDMI cables are the go-to choice for 4K clarity and beyond. They support video resolutions of 1080p and 4K, ensuring seamless, high-definition delivery of audio and video signals.
The easiest way to figure out if an HDMI cable is 4K compatible is to check its speed rating or its maximum bandwidth. A cable rated at 18 Gbps maximum bandwidth is fast enough to give you 4K video. If your HDMI cable is labeled “high speed,” it should be able to pass a 4K signal at lengths of up to three meters.
HDMI has different versions. Version 1.2 added dvd-audio capabilities for example. Version 1.4 added 4k resolution support, so any HDMI that is 1.4 supports native 4k resolution. Regular hdmi cables that are not 4k are going to be in 1080p and upscale to fit the 4k screen if I'm not mistaken.
How do I know if my TV is 4K? If you go to the settings of your TV, it should tell you what resolution your screen device is. If you have a 4K TV, the TV product specifications for resolution is usually shown as "3840 x 2160".
Standard HDMI Cable
Designed for older devices, these cables support up to 720p or 1080i resolution. They work well for basic HD content but aren't suitable for 4K or 3D video. Standard HDMI cables are ideal for connecting older TVs, DVD players, or basic gaming consoles.
HDMI port types explained
For example, an HDMI 2.0 port supports 4K at 60Hz, HDR, and ARC audio, making it good for streaming media players and cable boxes. Meanwhile, an HDMI 2.1 port supports 4K at 120Hz (or 8K at 60Hz), VRR, ALLM, and eARC, which is great for next-generation consoles like the PS5.
4K UHD, HDR, Dolby Vision HSD, and Dolby Atmos are available on specific TV models and may not be supported on all TV or receiver HDMI ports. You'll also need a 4K-capable HDCP 2.2 compliant HDMI cord. Refer to your TV manual to see if you can receive content in 4K, HDR, Dolby Vision, and/or Dolby Atmos.
Smart TVs are very much like smartphones; they stream entertainment straight to your TV via an internet connection. This means that you can watch all the latest films, box sets and play games on your smart TV without the need for an aerial, cable or separate streaming device.
Using the wrong HDMI cord can cause multiple types of damage. As mentioned at the beginning, the input portion of the cable may have suffered damage. The pins may have become bent or crooked, which will cause the data placed into the device to not transfer accurately, corrupting the way the device receives data.
Wired HDMI is great for high-quality and reliable performance. While wireless HDMI offers users flexibility and a clean setup. If you care about the best quality and lowest cost—go for wired HDMI. And if you want convenience and a wireless experience—wireless HDMI might be worth the extra cost.
Whether you're connecting the player to a home theater receiver, sound bar, or directly to your TV, you'll need to make sure the inputs on your device are HDCP 2.2 compatible. If you don't have a 4K TV, you can still watch 4K Blu-rays on a 1080p TV, but obviously won't get the full effect.
You don't need a single specific HDMI cable for a 4K TV. However, you will need to make sure your HDMI cable is a high-speed one. High-speed HDMI cables are crucial for enjoying 4K content. Thus, you should avoid simply purchasing a standard HDMI cable, designed only for 1080p content.
HDMI connectors are available in three sizes: standard, mini and micro. There are also different types of HDMI cable (see the chart below). Not all cables use the logo but the cable specifications should indicate whether it is standard, high speed, Premium High Speed or Ultra High Speed.
Check for Mention of HDMI 2.1 Features
To further know what HDMI cable you have, look for key specifications of HDMI 2.1 on the packaging, as we mentioned before: 48 Gbps bandwidth for high-speed data transmission. Support for 4K at 120Hz or 8K at 60Hz for ultra-high-definition visuals.
Check the Text on the Cable: Examine the text printed on the cable itself. Some HDMI cables indicate their version directly on the cable body. Inspect the Packaging or Receipt: Look at the packaging the cable came in or check your purchase receipt. Sometimes, the cable version is mentioned there.
At CES 2025, the HDMI Forum announced the latest HDMI specification, HDMI 2.2, which advances the technology. Does that mean you need to worry about upgrading your TV, gaming gear, and other home theater devices all over again? The short answer is: No, you're good.
Premium High-Speed HDMI: For 4K video at 60Hz, HDR and additional bandwidth for richer color, a Premium High-Speed HDMI cable is recommended. Ultra High-Speed HDMI: Supporting 8K video at 60Hz and 4K video at 120Hz, Ultra High-Speed HDMI cables are the latest standard, designed for high-resolution gaming and viewing.
Yes, there is a difference between 4K HDMI and regular HDMI. Regular (or standard) HDMI cables may not support the higher bandwidth needed for 4K resolution, especially at higher refresh rates or with HDR content.
To view content in 4K 50p/60p: Use a High-Speed HDMI cable to connect the TV to an HDMI device that supports 4K. To view content in 4K Enhanced Format (18Gbps): Use a Premium High-Speed HDMI cable to connect the TV to an HDMI device that supports 4K.
Smart TVs and 4K TVs are different in terms of what they specifically describe. Smart TVs are internet-enabled TVs that provide access to streaming services and other smart functions. 4K TVs are simply TVs that boast 4K resolutions. However, smart TVs can often also be 4K TVs.
For 4K streaming at 60fps, you need at least 25 Mbps upload speed. For 1080p at 60fps, 7.5 Mbps is recommended, while 720p at 60fps requires 6.2 Mbps.
Our top picks for the best 4K TVs