HDMI 2.1 vs Thunderbolt 4: External Display

What HDMI 2.1 and Thunderbolt 4 mean for an editor

When you connect an external monitor to your editing laptop, you are choosing between two main port types: HDMI and Thunderbolt. HDMI 2.1 is a display connection standard that appears on many laptops, monitors, and TVs. Thunderbolt 4 is a USB-C port standard that carries data, video, and power over a single cable. Both can drive high-resolution displays, but they work differently.

For video editing, the port you choose affects how many monitors you can connect, whether you can charge your laptop through the same cable, and how easily you can plug into a client's TV or a studio monitor. This article explains the differences in plain terms so you can read a laptop's port list and pick the connection that fits your workflow. For a broader look at laptop ports, see our ports guide.

HDMI 2.1: the dedicated display port

HDMI (High-Definition Multimedia Interface) is a standard for transmitting audio and video. HDMI 2.1 is the current version found on many laptops and monitors. It is a single-purpose port: you plug in an HDMI cable and connect to a display. Most laptops that include HDMI have at least one port, and many external monitors accept HDMI input.

When you read a laptop listing, look for the words "HDMI 2.1" in the ports section. If a listing only says "HDMI," it may be an older version. For editing, HDMI 2.1 is useful because it is widely compatible with monitors, TVs, and projectors. You do not need an adapter, and the connection is straightforward.

One thing to keep in mind: HDMI ports on laptops may support different resolutions and refresh rates depending on the graphics hardware. The port itself is a standard, but the laptop's graphics card and the monitor's capabilities determine what you can actually display. Always check the laptop's specifications for the maximum resolution and refresh rate over HDMI. For more on screen resolution, see our resolution guide.

Thunderbolt 4: the versatile USB-C port

Thunderbolt 4 is a USB-C port standard that combines data transfer, video output, and power delivery. It uses the USB-C connector, so it looks like any other USB-C port, but it offers higher performance and more features. Thunderbolt 4 ports support DisplayPort, which means you can connect an external monitor using a USB-C to DisplayPort cable or a USB-C to HDMI adapter.

A key advantage of Thunderbolt 4 is that it can carry video and power at the same time. You can connect a monitor that supports USB-C power delivery and charge your laptop through the same cable. This reduces cable clutter on your editing desk.

Thunderbolt 4 also supports daisy-chaining, which lets you connect multiple monitors in a series from a single port, provided your monitor supports it. This is useful if you want a multi-monitor setup for your timeline, color grading, and reference displays. However, not all monitors support daisy-chaining, so check the monitor's specifications.

Apple's MacBook Pro and MacBook Air include Thunderbolt 4 ports. According to Apple's technical specifications, the MacBook Pro with M5 has three Thunderbolt 4 ports, and the MacBook Air has two. These ports support DisplayPort and can drive external displays. For example, the MacBook Air supports up to two external displays over a single Thunderbolt port, according to Apple's specs. For more on Thunderbolt, see our Thunderbolt guide.

Comparing HDMI 2.1 and Thunderbolt 4 for editing

When choosing between HDMI 2.1 and Thunderbolt 4, consider what you need from your external display setup. HDMI 2.1 is the simplest option: it is a dedicated port that works with most monitors and TVs. Thunderbolt 4 is more flexible: it can carry video, data, and power, and it supports daisy-chaining.

For a single external monitor, both work well. If your monitor has an HDMI input, use HDMI. If your monitor has a USB-C input with DisplayPort support, Thunderbolt 4 can connect with a single cable and also charge your laptop.

For multiple monitors, Thunderbolt 4 has an advantage because you can daisy-chain displays. However, this depends on your laptop's graphics capabilities and the monitor's support for daisy-chaining. HDMI 2.1 typically requires one port per monitor, so you need multiple HDMI ports or adapters.

Another consideration is compatibility with client setups. If you often present your edits on a TV or a client's monitor, HDMI is the most common connection. Thunderbolt 4 requires an adapter or a USB-C to HDMI cable, which you may need to carry with you.

The choice also depends on your laptop. Some Windows laptops include both HDMI 2.1 and Thunderbolt 4 ports, giving you flexibility. Others may only have one or the other. Read the laptop's port list carefully to see what is available. For a guide on multi-display setups, see our multi-display guide.

How to read a laptop's port list for external displays

When you look at a laptop listing, the ports section tells you what connections are available. Look for the words "HDMI 2.1" or "Thunderbolt 4" specifically. If a listing says "HDMI" without a version, it may be an older standard, which could limit resolution or refresh rate. If a listing says "Thunderbolt 4," it means the port supports DisplayPort and power delivery.

For editing, you want at least one port that can drive a high-resolution external monitor. If you plan to use multiple monitors, check how many display-capable ports the laptop has. Some laptops have two Thunderbolt 4 ports, which can support two monitors. Others have one HDMI and one Thunderbolt 4, which also works.

Also consider the monitor you already own or plan to buy. Check its input ports: does it have HDMI, DisplayPort, or USB-C? If your monitor only has HDMI, you need an HDMI port on your laptop or an adapter. If your monitor has USB-C, Thunderbolt 4 can connect directly.

For a detailed guide on choosing a laptop for external displays, see our multi-display support guide.

Practical setups for editors

Here are a few common setups and which port to use for each:

For a single 4K monitor, use HDMI 2.1 if your monitor has an HDMI input. This is the simplest connection. If your monitor has USB-C, Thunderbolt 4 can also work and may charge your laptop.

For a dual-monitor setup, use one monitor on HDMI and the other on Thunderbolt 4. This uses both port types and avoids adapters. Alternatively, if your laptop has two Thunderbolt 4 ports, you can connect both monitors via USB-C.

For a multi-monitor setup with daisy-chaining, use Thunderbolt 4. Connect the first monitor to the laptop, then chain the second monitor from the first. This requires monitors that support daisy-chaining, which is common on professional displays.

For presenting on a TV, use HDMI. Most TVs have HDMI inputs, and you can plug in directly. If your laptop only has Thunderbolt 4, you will need a USB-C to HDMI adapter or cable.

For a clean desk with fewer cables, use Thunderbolt 4 with a monitor that supports power delivery. This lets you charge your laptop and display video with one cable.

What the catalogue cannot tell you

The laptop catalogue lists the ports on each laptop, but it cannot tell you the maximum resolution or refresh rate that a specific port will support with a given monitor. That depends on the graphics hardware and the monitor's capabilities. Always check the laptop's full specifications and the monitor's manual.

The catalogue also cannot tell you whether a Thunderbolt 4 port supports daisy-chaining with your specific monitor. That depends on the monitor's implementation of DisplayPort over USB-C. Check the monitor's specifications for daisy-chain support.

Finally, the catalogue cannot tell you about cable quality. For high-resolution displays, you may need a high-quality cable that supports the required bandwidth. Cheap cables can cause flickering or reduced resolution. Use the cable that came with your monitor or a reputable brand.

What to pick for your situation

Questions

Can you use an HDMI to USB-C adapter to connect a monitor?

Yes, you can use an adapter to connect an HDMI monitor to a Thunderbolt 4 port. The adapter converts the DisplayPort signal from Thunderbolt 4 to HDMI. Make sure the adapter supports the resolution and refresh rate you need.

Does Thunderbolt 4 support 4K at 60Hz?

Thunderbolt 4 supports DisplayPort, which can carry 4K at 60Hz and higher resolutions. The exact support depends on the laptop's graphics hardware and the monitor's capabilities. Apple's MacBook Air, for example, supports up to two external displays at 6K at 60Hz or 4K at 144Hz over Thunderbolt 4, according to Apple's specs.

Can you daisy-chain monitors with HDMI 2.1?

No, HDMI does not support daisy-chaining. Each HDMI monitor requires its own port on the laptop. To daisy-chain, you need Thunderbolt 4 or DisplayPort with Multi-Stream Transport (MST) support.

Which is better for video editing: HDMI 2.1 or Thunderbolt 4?

Neither is inherently better. HDMI 2.1 is simpler and more compatible with TVs and monitors. Thunderbolt 4 is more versatile, supporting video, data, and power over one cable, and it allows daisy-chaining. Choose based on your monitor's inputs and your setup needs.

Do all laptops have both HDMI and Thunderbolt 4?

No. Some laptops have both, while others have only one or the other. Check the laptop's port list. For example, Apple's MacBook Pro has Thunderbolt 4 and an HDMI port, according to Apple's specs. Windows laptops vary by model.