Does Your USB-C Port Support Video? ~ Plugable Technologies

TL;DR

Every USB-C port looks the same, but not every one can send video to a monitor or charge your laptop.
The small mark next to the port usually tells you which, and your laptop's spec sheet confirms it.
A Thunderbolt logo, a USB 40Gbps or 80Gbps logo (USB4), or a DisplayPort (DP) logo means the port supports video.
An "SS" USB trident, or a USB 5Gbps or 10Gbps logo, only promises data. The port may have no video.
Once you know, you can choose a dock that works with your port.

One laptop edge with four identical USB-C ports, each with a different mark above it and a different mix of video, charging and data underneath

For the technical detail behind each video technology, see our support article How to Determine Your USB-C Port Video Capabilities.

Step 1: Look at the mark next to the port

Chart of six USB-C port marks and what each tells you about video, charging and data

Thunderbolt logo, a USB 40Gbps or 80Gbps logo (USB4), or a DisplayPort (DP) logo: the port supports video.
"SS" USB trident, or a USB 5Gbps or 10Gbps logo: this mark only promises data. The port may have no video.
Plug or battery icon: usually the charging port. If you want your dock to charge your laptop, plug it in here. Thunderbolt 4 and 5 laptops charge on at least one Thunderbolt port, but not always every one. High-wattage gaming and workstation laptops may still need their own power adapter.
No mark: check the spec sheet. (MacBooks are the exception: every USB-C port on an Apple Silicon MacBook supports video and charging, except on MacBook Neo, where only the left USB-C port supports an external display and the right port runs at USB 2 speeds. Apple shows how to identify your Mac's ports.)

Step 2: Confirm it in the spec sheet

Look up your laptop model on the maker's support site and find the Ports section. Many laptops have one full-featured USB-C port and one that's data-only, so read each port's description:

Video: "Thunderbolt", "USB4", "DisplayPort" or "DP Alt Mode"
Charging: "Power Delivery" or "PD"
No video: "data only", or a USB speed with nothing else listed

On Windows, you can also open Device Manager and look for USB4 Host Router or Thunderbolt Controller. Either one means your laptop has at least one Thunderbolt or USB4 port, which supports video. It doesn't tell you which port, so use the mark from Step 1 or the spec sheet to find it.

Seeing "Display connection might be limited"?

Windows notification: Display connection might be limited. Make sure the DisplayPort device you're connecting to is supported by your PC.

Windows shows this message when it detects a dock, adapter, or USB-C monitor that your laptop can’t fully support over that connection. You may get no picture, or a lower resolution than expected. Work through these checks:

A laptop, cable, small adapter, dock and monitor in a row, with numbered checkpoints at the laptop port, the cable and the adapter

The laptop port. Try another USB-C port. The one you're using may be data-only.
The cable. Use the cable that came with your dock. Some USB-C cables don't carry video.
Anything in between. Remove any hub, extension or adapter and connect the dock directly to the laptop.
Other USB-C devices. If you have more than one USB-C display or adapter connected, unplug the others and try again.

If none of that helps, the port most likely doesn't support video, and you need a different kind of dock (below). More troubleshooting: "Display connection might be limited" in our knowledge base.

Pick a dock that fits your port

Your port	Dock to use	Plugable example
Thunderbolt 4, Thunderbolt 5 or USB4	Thunderbolt dock	TBT4-UD5: two 4K 60Hz displays or one 8K display(on the downstream Thunderbolt 4 port), up to 100W laptop charging. On a Mac, base M1 and M2 chips get one display, and base M3 gets two only with the lid closed. Single display is supported on Windows Thunderbolt 3 and non-Thunderbolt USB-C ports.
USB-C with video (DP Alt Mode)	USB-C dock	UD-ULTC4K: up to three 4K 60Hz displays, one using your laptop's own video and two using DisplayLink, up to 100W laptop charging. Full triple 4K 60Hz needs DP 1.4 Alt Mode; on DP 1.2 laptops, one display drops to 4K 30Hz. Works on Windows and Mac; the two DisplayLink screens need a DisplayLink driver installed.
Data only (no video), USB-C or USB-A	DisplayLink dock or adapter	USBC-6950U: two HDMI displays up to 4K 60Hz. Needs a USB 3.0 (5Gbps) or faster port and a DisplayLink driver on Windows and macOS.

Plugable TBT4-UD5 dock showing front ports: audio, Micro SD/SD, two USB 5Gbps, Thunderbolt, 96W power, and power button.

For Thunderbolt or USB4 ports

Plugable Thunderbolt 4 Dock for 4K Dual Monitors or Single 8K, 100W Laptop Charging

View the TBT4-UD5

Plugable UD-ULTC4K 13-in-1 docking station with USB 5Gbps, Ethernet, DisplayLink, 100W power, SD card, and 20W PD port.

For USB-C ports with video

Plugable USB-C Triple 4K Monitor Docking Station with 100W Laptop Charging

View the UD-ULTC4K

Plugable USBC-6950U dual HDMI adapter with USB-C and USB-A host connection and DisplayLink 4K Plug and Display.

For data-only ports

Plugable 4K Dual HDMI Adapter for USB-C & USB 3.0

View the USBC-6950U

Dig deeper: the specifications

Plugable: How to Determine Your USB-C Port Video Capabilities, our support article on Thunderbolt, USB4 and DP Alt Mode video
Thunderbolt (Intel): Thunderbolt 5 technology brief (PDF), which compares the Thunderbolt 4 and 5 requirements for displays, speed and charging
DisplayPort Alt Mode (VESA): DisplayPort over USB-C
USB4 (USB-IF): USB4 specification
USB Power Delivery (USB-IF): USB Power Delivery specification
Windows (Microsoft): USB-C overview, which lists every USB-C warning Windows shows and how to fix it

Frequently Asked Questions

How can I tell if my USB-C port supports video?

The small mark next to the port usually tells you, and your laptop's spec sheet confirms it. A Thunderbolt logo, a USB 40Gbps or 80Gbps logo (USB4), or a DisplayPort (DP) logo means the port supports video.

Which USB-C port charges my laptop?

A plug or battery icon usually marks the charging port. Thunderbolt 4 and 5 laptops charge on at least one Thunderbolt port, but not always every one. High-wattage gaming and workstation laptops may still need their own power adapter.

Do all MacBook USB-C ports support video?

Every USB-C port on an Apple Silicon MacBook supports video and charging, except on MacBook Neo, where only the left USB-C port supports an external display and the right port runs at USB 2 speeds.

What does "Display connection might be limited" mean?

Windows shows this message when it detects a dock, adapter, or USB-C monitor that your laptop can’t fully support over that connection. You may get no picture, or a lower resolution than expected.

What dock should I use if my USB-C port doesn't support video?

Use a DisplayLink dock or adapter, such as the Plugable USBC-6950U: two HDMI displays up to 4K 60Hz. It needs a USB 3.0 (5Gbps) or faster port and a DisplayLink driver on Windows and macOS.

USB4, USB Type-C and the USB 40Gbps logo are trademarks of USB Implementers Forum (USB-IF). Thunderbolt is a trademark of Intel Corporation or its subsidiaries. DisplayPort is a trademark of the Video Electronics Standards Association (VESA). Apple, Mac and MacBook are trademarks of Apple Inc. Windows is a trademark of Microsoft Corporation. All other trademarks are the property of their respective owners.