The main difference in HDMI versus USB is the job each cable does. HDMI sends high-quality video and sound from a source, like a laptop or game console, to a TV or monitor. USB moves files, connects accessories, and charges devices.
HDMI can't charge your phone, and a basic USB cable can't send a movie to your TV. The lines blur a little with USB-C, since some USB-C ports also carry video. Still, most homes need both. Below, we compare speed, signal, power, and port shapes so you know which cable to grab for each job.
What is HDMI?
HDMI stands for High-Definition Multimedia Interface. It came out in 2003 to replace the bundle of analog cables behind TVs. One HDMI cable carries digital video, multi-channel audio, and remote-control signals. The newest version, HDMI 2.1, moves up to 48 Gbps.
That is enough for 4K at 120 Hz or 8K at 60 Hz. You'll find HDMI on TVs, monitors, projectors, game consoles, and streaming boxes. Out of the pair, HDMI and USB, HDMI is the one built mainly for screens. It's also the plug most people reach for first when setting up a new TV.
What is a USB Cable?
USB stands for Universal Serial Bus. It arrived in 1996 to replace a mess of serial, parallel, and mouse ports with one simple plug. A USB cable moves data and power at the same time. USB 2.0 runs at 480 Mbps, USB 3.2 reaches 10 or 20 Gbps, and USB4 hits 40 or 80 Gbps.
With USB Power Delivery, a USB-C cable can charge a laptop with up to 240 watts. Most homes keep an HDMI and USB cable drawer for this reason, since each one handles different jobs.
HDMI vs USB Comparison
Both cables plug into the same laptops and TVs, so it's easy to mix up their roles. The quickest way to see the gap is side by side. The table below compares an HDMI cable and USB cable on speed, power, length, and everyday use, so you can match each one to the right device.
|
Feature |
HDMI |
USB |
|
Main job |
Video and audio to a screen |
Data transfer, accessories, and charging |
|
Year introduced |
2003 |
1996 |
|
Signal |
Digital video and audio (TMDS or FRL) |
Digital data; video only on some USB-C ports |
|
Top speed |
48 Gbps (HDMI 2.1) |
80 Gbps (USB4 v2), 480 Mbps on USB 2.0 |
|
Max video |
8K at 60 Hz, 4K at 120 Hz |
8K through USB-C with DisplayPort Alt Mode |
|
Audio |
Up to 32 channels, Dolby Atmos via eARC |
Yes, through USB audio devices |
|
Power delivery |
About 5 V at 55 mA, not for charging |
Up to 240 W with USB Power Delivery |
|
Common plugs |
Type A, Mini (Type C), Micro (Type D) |
USB-A, USB-B, USB-C, Micro-USB, Mini-USB |
|
Pins |
19 |
4 (USB 2.0) to 24 (USB-C) |
|
Typical passive length |
Up to about 15 m |
About 5 m (USB 2.0), 2 to 3 m (USB 3.x) |
|
Two-way data |
Limited (CEC, ARC, EDID) |
Full two-way data |
|
Copy protection |
HDCP |
Not built in |
|
Typical devices |
TVs, monitors, consoles, projectors |
Phones, drives, keyboards, printers, chargers |
|
Hot-plug support |
Yes |
Yes |
|
Locking plug |
No (some HDMI cables add a latch) |
No, except some industrial USB |
|
Cable price |
Low to moderate |
Low to moderate |
Technicalities in Choosing Between HDMI or USB Cables
Plugs that look simple can hide very different technology. Before you buy a USB and HDMI cord, it helps to look under the hood. Four things decide which one fits your setup: how much data it moves, the type of signal, the power it carries, and the shape of the port. Here's each one in turn.
Data Transmission Capabilities
HDMI moves a huge amount of data, but almost all of it flows one way. Video and sound travel from the source to the screen. A little information goes back, such as which resolutions the TV supports. That one-way design is why HDMI 2.1 can push 48 Gbps without breaking a sweat. Most of that space goes to pixels, frame rate, and color depth.
USB works both ways all the time. Your computer sends data to a flash drive and reads data back from it. Speeds range from 480 Mbps on USB 2.0 to 80 Gbps on USB4 version 2.0. You won't find a single HDMI USB wire that does both jobs at full speed.
Each standard sticks to its own lane. That's also why a fast USB cable doesn't make your TV image any sharper, and a premium HDMI cable won't copy files any quicker.
If your TV or monitor runs at 4K 60 Hz, HDMI 2.0 is enough. For 4K at 120 Hz on a new console, you'll want HDMI 2.1. Getting an idea of HDMI 1.4 and 2.0 bandwidth helps you know which version your screen needs.
Signal Type and Quality
HDMI sends uncompressed digital video in most setups. The screen gets every pixel just as the source made it, so there's no blur or lag from squeezing the image. It also carries HDCP copy protection, which streaming apps and Blu-ray players require.
USB was built for data, not video. Standard USB-A ports can only show video through a special adapter that compresses the image with software called DisplayLink. That works fine for spreadsheets and email on a second office screen.
It can stutter in fast games or full-screen video, though, because the computer has to squeeze every frame first. USB-C works a little differently. Many of its ports use DisplayPort Alt Mode to send real, uncompressed video.
People sometimes ask about USB over HDMI. The HDMI standard doesn't carry USB data. KVM extenders can send both signals over one Cat6 cable, but they use their own boxes at each end.
Power Supply and Charging
HDMI carries only a tiny 5-volt supply at about 55 milliamps. It's there so the TV and source can talk during the handshake. It can't charge a phone or run a device.
USB is the power champ. USB 2.0 gives 2.5 watts, and USB-C with Power Delivery can reach 240 watts. That's enough to charge a gaming laptop. So when a device needs both a screen link and power, you usually need two separate cables, or a USB-C cable that handles both.
You may spot an HDMI USB cable in stores and wonder what it does. Most are active HDMI cables, like fiber-optic models, that need a little extra power for their built-in chips. A short USB lead supplies that power from a TV or wall charger.
Others are plain adapters. An HDMI cable with USB end for video usually has a USB-C plug and only works if the laptop's port supports video. Look for the DisplayPort or Thunderbolt logo next to the port before you buy. If there's no logo, check the laptop's spec sheet for "video output" on USB-C.
Physical Port Design
The ports look nothing alike once you know what to check. A full-size HDMI port is about 14 mm wide, with two slanted corners on the bottom. USB-A is a flat rectangle about 12 mm wide. USB-C is a small oval that works either way up.
When you compare an HDMI vs USB port on the back of a TV, the HDMI one is wider and has those angled corners. Small devices make things trickier. A Micro HDMI port is about 5.8 mm wide, and a Micro USB port is about 6.9 mm wide.
They sit side by side on many cameras and tablets. The micro HDMI vs micro USB mix-up causes plenty of bent pins, so check the label before you push hard. Micro HDMI has a flatter, wider face, while Micro USB has two slanted corners on one side.
There's no single HDMI USB type of plug that fits both ports. Each standard has its own family of shapes. HDMI comes in Type A, Mini, and Micro. USB comes in A, B, C, Micro, and Mini. Our guide to display cable types lays out every video plug side by side.
Practical Applications of HDMI and USB Cables
Most homes and offices use both cables every day. One runs the screens, and the other handles everything else. A laptop with a USB and HDMI port side by side is the perfect example. The two lists below show where each cable fits best, so you grab the right one the first time.
When to Use HDMI Cables?
HDMI is the go-to choice any time video and sound need to reach a screen. It works the moment you plug it in, with no drivers or settings. If your laptop only has USB-C, a USB cable HDMI adapter or USB-C to HDMI cable bridges the gap. These are the setups where HDMI makes the most sense.
- Connecting a streaming box, cable box, or Blu-ray player to a TV in the living room.
- Linking a PS5, Xbox Series X, or Nintendo Switch dock to a TV or monitor.
- Sending a laptop's screen to a projector or large display in a classroom or meeting room.
- Running sound from a TV to a soundbar or AV receiver through ARC or eARC.
- Feeding a camera's live video into a field monitor or a capture card for streaming.
When to Use a USB Cable?
USB is the workhorse for everything that isn't a big screen. It charges, syncs, and connects all sorts of gear. Most devices come with a USB cable in the box, though it's often short and thin. Our guide to monitor cable types covers USB-C monitors too. Here are the jobs USB handles best.
- Charging phones, tablets, earbuds, smartwatches, power banks, and many newer laptops.
- Moving photos, videos, and backups to flash drives, portable SSDs, and external hard drives.
- Connecting keyboards, mice, webcams, microphones, and game controllers.
- Linking printers and scanners to a desktop or laptop computer.
- Running a USB-C monitor that takes video and power on a single cable.
Get the Right Connection Every Time With TS Cables
HDMI handles video and sound, while USB handles data and power. Pick the right USB vs HDMI port for each device, and check speed ratings before you buy. Shop TS Cables for high-speed video cables and USB cords built for clear images and fast, reliable charging.
FAQs
Does HDMI carry power?
It carries only a little. HDMI supplies about 5 volts at 55 milliamps for the handshake between devices. It can't charge phones, so you still need a USB cable for power.
Is HDMI the same as USB?
No, they're different standards. HDMI sends video and audio to screens, while USB moves data and power. Their plugs, pins, and speeds are all different too.
Do USB to HDMI cables work?
Yes, if your USB-C port supports video through DisplayPort Alt Mode or Thunderbolt. Look for a DisplayPort or lightning bolt icon next to the port.
Does USB to HDMI Work Without USB-C?
Only with a DisplayLink adapter and its driver. USB-A ports don't carry video on their own, so a plain cable won't show anything on the screen.
How long can an HDMI cable be?
Passive HDMI cables work well up to about 15 meters. Longer runs need active or fiber cables. See these cable distance limits for details.
Further Reading
Every cable in your setup has its own strengths and limits. The TS Cables blog breaks down video, audio, and power connections in everyday language. These are worth a look next:
