Your HDMI cable is probably too old for your TV — here's how to tell in 30 seconds

Unlike USB charging cables, HDMI cables are usually tucked away behind a cabinet or into a tangle of wires you never want to touch. But out of sight often means out of mind, and that means you could be using the same HDMI cable for years, even after upgrading your TV.

And that’s a problem because modern TVs are far more capable than they were a few years ago. If you’re still using that old cable, newer features like 4K at 120Hz, Variable Refresh Rate (VRR), Auto Low Latency Mode (ALLM), and advanced HDR formats simply may not work. Yes, you might still get a picture, but you could be missing out on some of your TV’s best features. The good news is that it’s ridiculously easy to figure out if it’s time to upgrade the cable.

Why using the right HDMI cable is important

They all look the same, but they don’t work the same

The most confusing thing about HDMI cables is that they all look the same. And unlike USB ports, there are no color-coding visual clues that can help you tell one generation apart from another. Yes, even that shiny gold-plated HDMI connector is usually just a marketing gimmick.

What makes it even more frustrating is that using an older HDMI cable with your new TV won’t cause it to stop working. You’ll still get a picture, which means you won’t be able to tell there’s a problem. Instead, the signs are often subtle.

The reason comes down to bandwidth. Features like 4K at 120Hz, 8K resolution, VRR, ALLM, and advanced HDR formats require significantly more data to be transmitted every second than older standards were designed to handle.

The best way to make sense of HDMI cables is to focus on HDMI standards. Each generation supports a different maximum bandwidth, and that ultimately determines which resolutions, refresh rates, and features the cable can handle.

Check the text on the cable or test it with a display

No need to guess

While an HDMI cable from 2010 may look almost identical to one made in 2025, you can still tell them apart. Your best clue is usually the cable itself. Most HDMI cables have some label printed on the cable jacket itself. This could say High Speed HDMI, Premium High Speed HDMI, or Ultra High Speed HDMI. These basically indicate different HDMI generations.

• High Speed HDMI Cable: Mostly associated with HDMI 1.4 cables that are designed for older 1080p TVs.
• Premium HDMI Cable: Refers to HDMI 2.0 cables that support features like HDR and 4K at 60Hz.
• Ultra High Speed HDMI Cable: Designed for HDMI 2.1 cables that can handle 4K at 120Hz, 8K, VRR, ALLM, and eARC.

If your cable has no markings at all, though, things get a bit trickier. In that case, your next best option is to look for a QR code tied to the cable or the original packaging. If you don’t have either, testing it is the only reliable option left. If it’s an old cable, it won’t support modern features.

For instance, you can try plugging in the HDMI cable and setting your TV to 4K and 60Hz. If it doesn’t work or if the option is greyed out, you might be looking at an old HDMI 1.4 cable. If it does work, though, the cable is likely an HDMI 2.0 or HDMI 2.1. And to find out which one it is, you can try enabling more demanding modes like 4K at 120Hz or 8K if your TV supports it.

Another way to differentiate between HDMI 2.0 and 2.1 cables is by enabling features eARC, VRR, and ALLM on your TV. If those modes work, it means you’re using an HDMI 2.1 cable. If not, it’s an older HDMI 2.0 cable.

Symptoms that can tell you if the HDMI cable needs replacing

It’s not just the HDMI standard that can affect the picture and sound quality. If your HDMI cable supports the right standard, age and wear can still cause problems. The most obvious symptom is damaged cable or connectors. Any of these can affect the fit and the picture quality.

Another clear sign is a decline in picture or sound quality. For instance, if you haven’t changed any settings or replaced any devices, but the picture quality seems worse than before, it could be that the HDMI cable is just too old. Most quality cables usually last around 10 years, so if yours is older than that, it’s probably time to grab a new one. And of course, the biggest red flags are reliability issues. If you’re dealing with black screens or flickering, the cable could be failing. An easy way to confirm that is to simply swap the cable with another HDMI cable.