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Connect Two 4K Displays from a Single
Thunderbolt 3 Port on a Mac or PC

Sonnet’s Thunderbolt™ 3 to Dual DisplayPort Adapter is certified for use with both Mac® and Windows® Thunderbolt 3 equipped computers, and enables you to connect one or two larger displays to a single Thunderbolt 3 port on your computer. With the adapter connected, you can connect up to two 4K @ 60Hz DisplayPort (DP) monitors, or one 5K @ 60Hz DP monitor.

Work Efficiently

Display with Apps Windows IconWhether you need to view your work on a large UHD display or across two displays, or you need to view it with the highest resolution possible, this Sonnet plug-and-play adapter enables you to work more efficiently. With two displays attached, you can fill one with full-screen workspace, and use the other for tools, other applications, and more.

Convenient – No External Power
Adapter Required

To use it, simply plug in the Sonnet Thunderbolt 3 to Dual DisplayPort Adapter into one of your computer’s Thunderbolt 3 ports, and connect DisplayPort cables (sold separately) between the adapter and your monitors. Your computer powers the Sonnet adapter, so there’s no need to connect an additional power adapter.


Thunderbolt Certified for Mac® and Windows®, the Sonnet Thunderbolt 3-to-Dual DisplayPort Adapter can be used with the latest and best computers available. If you need to connect a monitor without a DisplayPort (DP) input, the Sonnet dual DisplayPort adapter is compatible with active DP-to-HDMI, DP-to-DVI, and DP-to-VGA adapters. And, unlike USB adapters, the Sonnet adapter won’t drain system resources that might impact your computer’s performance.

Key Features

Connects Up to Two DisplayPort Displays to a Single Thunderbolt 3 Port—Enables connection of two 4K DisplayPort (DP) displays @ 60Hz, or one 5K DP display @ 60Hz to a single Thunderbolt 3 port on your computer

Compatible with Both Mac and Windows—Thunderbolt certified for use with macOS and Windows computers with Thunderbolt 3 ports

Enables You to Work More Efficiently—Fill one display with full-screen workspace; use the other for tools, other applications, etc.

No Power Adapter Required—Sonnet adapter draws power from Thunderbolt 3 port

Backward-compatible with 1080p HD Displays
Great for use for different home and office workspace applications

Compatible with Active HDMI, DVI and VGA
—Enables connection of non-DisplayPort displays

Built In Audio Support—No need to connect additional cables, audio signal passed over DisplayPort connection to display that has audio output capabilities

Compact and Rugged Design—Portable aluminum enclosure with two DisplayPort connectors

Won't Drain System Resources—Unlike USB video adapters, the Sonnet adapter makes no impact on your computer’s performance


Connect One 5K or Two 4K or Full HD Displays

Adapts to Your Needs

Although the Sonnet adapter supports one monitor with a 5120 x 2880 resolution (5K), or two monitors at resolutions up to 4096 x 2160 (4K), you can also use it to connect monitors with lower resolution, like full HD 1080p (1920 x 1080) or 1920 x 1200 monitors. This makes it great for use for different home and office workspace applications. And, with built-in audio support, there’s no need for you to connect an additional cable to hear sound from the monitors.




Although Sonnet’s Thunderbolt 3 to Dual DisplayPort Adapter supports the connection of up to two 4K monitor or one 5K monitor with 60Hz refresh rates, the actual number of monitors it will support, as well as the screen refresh rates, are determined by your computer. Click here to view a list of Thunderbolt 3 hosts (computers) and their capabilities; please note that at any given time this list may not be complete. Click the appropriate Filter by Brand/OEM link, and then find your computer model. Check the center column to identify its external display support capabilities. If your model is not listed, contact your computer’s manufacturer for information. If “Dual 4K@60Hz” is listed, your computer will also support a 5K monitor @ 60Hz.


Thunderbolt 3 to Dual DisplayPort Adapter

 Computer hardware shown in photos for illustration purposes; items sold separately.
See Tech Specs Tab for footnotes
Part No.  
TB3-DDP4K Sonnet Thunderbolt 3 to DisplayPort Adapter
Warranty 2-year
Form Factor Display apdater
Bus Interface 40Gbps Thunderbolt 3
External Connectors Two DisplayPort ports
Standard DisplayPort 1.2 and HDCP 2.2(1)
Supported Resolutions
  • 5120 x 2830(2)
  • 4096 x 2160
  • 3840 x 2160
  • 2560 x 1600
  • 1920 x 1200
  • 1920 x 1080
  • 1280 x 720
Dimensions (WxDxH) 2.3 x 3.9 x 0.6 in. (59 x 99 x 16 mm)
Dimensions, Cable (Length) 11.8 in. (300 mm)
RoHS Compliant Yes
Package Contents
  • Thunderbolt 3 to Dual DisplayPort Adapter
  • Documentation


Specifications subject to change without notice.






Mac Compatibility

Macs with two Thunderbolt 3 ports support two 4K monitors

Macs with four Thunderbolt 3 ports support four 4K monitors with two Sonnet adapters(3)

macOS® 10.12.6+

macOS Mojave compatible

Windows Compatibility

Windows PC with Thunderbolt 3 ports

Windows 10 (64-bit Edition Version 1809 or greater)

Monitor Compatibility

EDID Version 1.4(4)

Technical Notes

  1. macOS supports HDCP only with iTunes.
  2. 5120 × 2880 (5K) resolution support requires the connection of both adapter ports to a compatible 5K monitor’s DP ports using DP cables (sold separately).
  3. Plug one into a left side port and one into a right side port.
  4. EDID stands for Extended Display Identification Data. This is how the monitor identifies its resolution modes to the adapter. EDID Version 1.4 was finalized in 2006. If your HDMI monitor is more than 10 years old, it will likely not be supported.

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Product Quick Overview - Thunderbolt 3 to Dual DisplayPort Adapter (1:49 mins)

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