Dual 4K Monitor Mini Thunderbolt 3 Dock with DisplayPort - Mac & Windows Docking Station - Discontinued, Limited Stock, & Replaced by TB3DKM2DPL (TB3DKM2DP)

Laptop Docking Station | Mac & Windows® | Bus-Powered | 1x USB-A

Product ID: TB3DKM2DP

4.3 stars (6 reviews) |
  • REPLACED BY TB3DKM2DPL: New version offers the same functionality plus, extra-long 11" (28cm) attached cable provides extended reach to reduce port/connector strain on MacBook's and laptops on riser stands
  • Add dual UHD 4K DisplayPort monitors at 60Hz or a single 5K 60Hz display to your laptop, with this portable Thunderbolt 3 docking station
  • DUAL 4K 60HZ DP: This mini Thunderbolt 3 dock supports 40Gbps of throughput and 4K resolution at 60Hz on two DP monitors (up to 4096 x 2160P), through a single TB3 port
Your price
€198.99 EUR excl. VAT
€238.79 EUR incl. VAT

The bus-powered Thunderbolt 3™ docking station connects to dual 4K DisplayPort displays, Gigabit Ethernet and a USB 3.0 (Type-A) port. Compatible with macOS and Windows®, it’s the ideal accessory for your Thunderbolt 3 laptop and for flexible setup, the attached USB-C cable has an extended length of (7.9 in. | 20 cm).

Create a Dual-4K 60Hz Workstation

Great for editing 4K video or other Ultra HD tasks, this portable dual DisplayPort docking station supports 40Gbps of throughput and 4K resolution at 60Hz on two DisplayPort monitors, through a single Thunderbolt 3 port.

Connect your laptop to:

  • 2x 4K DisplayPort displays (up to 4096 x 2160p @ 60Hz)

          OR

  • 1x 5K display (5120 × 2880 @ 60Hz)

Easy Installation & Deployment  

Simply connect the TB3 dock to your laptop with included TB3 cable and start working immediately. No time-consuming driver installations are required.

The Ports You Need Most

To enhance your productivity, the Gigabit Ethernet port (with PXE Boot and Wake-on-LAN support) ensures reliable wired network access. A USB 3.0 Type-A port, with ample space around it, lets you connect a USB device, like a flash drive, for easy file access. 

The TB3DKM2DP is Thunderbolt Certified, and backed by a StarTech.com 3-year warranty and free lifetime technical support.

Applications

  • Review/edit images or media files on two 4K DisplayPort displays
  • Transfer a 4K movie in under 30 seconds
  • Ideal for shared or temporary work stations, such as hot desks (hoteling)

Partner Numbers

  • Ingram Micro France V934351
  • Tech Data - France 4710775
  • UPC 065030872904

Compatibility

  • Windows 10 logo
  • Windows 8 logo
  • Windows 7 logo
  • macOS High Sierra (10.13) logo
  • macOS Sierra (10.12) logo
  • macOS Mojave (10.14) logo
  • macOS Catalina (10.15) logo
  • macOS Big Sur (11.0) logo
Windows® 7, 8, 8.1, 10
macOS 10.12 - 10.15, 11.0

Specifications

Warranty Information Warranty 3 Years
Connector(s) 1 - Connector Type(s) Thunderbolt™ 3 USB-C (24-pin) (40Gbps)
2 - Connector Type(s) DisplayPort (20 pin)
1 - Connector Type(s) USB Type-A (9 pin) USB 3.0 (5 Gbps)
RJ-45
Environmental Operating Temperature 5°C to 35°C (41°F to 95°F)
Storage Temperature -40°C to 70°C (-40°F to 158°F)
Humidity 5~95% RH (Non-condensing)
Hardware 4K Support Yes
Fast-Charge Port(s) No
Displays Supported 2
Bus Type Thunderbolt 3
Industry Standards Thunderbolt 3
IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
USB 3.0 - Backward compatible with USB 2.0 and 1.1
Chipset ID Intel - Alpine Ridge JHL6540
Intel - WGI210AT
Texas Instruments - TPS65983
ASMedia - ASM1042A
Packaging Information Shipping (Package) Weight 268.2 g [9.5 oz]
Package Length 20.8 cm [8.2 in]
Package Width 14.5 cm [5.7 in]
Package Height 42.0 mm [1.7 in]
Performance Maximum Data Transfer Rate 40 Gbps (Thunderbolt 3)
5 Gbps (USB 3.0)
2 Gbps (Ethernet; Full-Duplex)
Maximum Digital Resolutions Dual 4K displays - DisplayPort 4096 x 2160p @ 60Hz / 3840 x 2160p @ 60Hz
Single 5K display - DisplayPort 5120 × 2880 @ 60Hz
Type and Rate Thunderbolt 3 - 40 Gbit/s
UASP Support Yes
Compatible Networks 10/100/1000 Mbps
Auto MDIX Yes
PXE No
Full Duplex Support Yes
Physical Characteristics Color Black & Gray
Material Aluminum
Cable Length 20 cm [7.9 in]
Product Length 12.0 cm [4.7 in]
Product Width 60.0 mm [2.4 in]
Product Height 18.8 mm [0.7 in]
Weight of Product 145.8 g [5.1 oz]
Power Power Source USB-Powered
Software OS Compatibility Windows® 7, 8, 8.1, 10
macOS 10.12 - 10.15, 11.0
Special Notes / Requirements System and Cable Requirements Thunderbolt 3 equipped computer with a Thunderbolt 3 port.
Note A 4K-capable display is required to achieve 4K x 2K resolution (4K is also known as 4K x 2K).
A 5K-capable DisplayPort display is required to achieve 5120 × 2880 resolution.
Certain monitors may be limited to 4K at 30Hz when connecting through DisplayPort. These monitors include the following models: Dell P2715Q, Viewsonic VX2475Smhl-4K, Philips 288P6LJEB, LG 31MU97C-B, Asus PB287Q (these models will need to be set to 4K at 30Hz).
Active adapters are required if adapting DisplayPort to HDMI/DVI/VGA monitors.
To convert from DP to DVI (or HDMI, VGA), an active adapter is required, such as DP2VGA, DP2VGA2, DP2VGA3, DP2HD4KS or DP2HD4K60S
What's in the Box 1 - Included in Package Thunderbolt 3 Dock
Docking Station
Instruction Manual
User Manual

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Drivers/Downloads

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Driver(s):

Datasheet

Product Support

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Frequently Asked Questions

Installation

Active adapters are required if adapting DisplayPort to HDMI or DVI monitors. Active adapters use additional chips to make the conversion inside the adapter. Passive DisplayPort to HDMI or DVI will not work with this device.

Troubleshooting

If you set your display to [email protected] and connect a display to the DisplayPort output on the laptop docking station, your display may flicker. This issue only affects certain monitors and is a result of an interoperability issue between the hardware used in the display and the docking station. This issue is not specific to StarTech.com docking stations.

To resolve this issue, try any of the following:

  • Connect a USB-C to DisplayPort cable from the USB-C Thunderbolt 3 port on the docking station to the DisplayPort input on the display. (StarTech.com product ID for the USB-C to DisplayPort cable: CDP2DPMM1MB.)
  • Connect a USB-C to HDMI 2.0 cable from the USB-C Thunderbolt 3 port on the docking station to the HDMI input on the display. (StarTech.com product ID for the USB-C to HDMI 2.0 cable: CDP2HD4K60.)
  • If you are using a dual monitor setup, connect a dual DisplayPort adapter from the USB-C Thunderbolt 3 port on the docking station to the DisplayPort input on the displays. (StarTech.com product ID for the Thunderbolt 3 dual DisplayPort adapter: TB32DP2.)
  • Disable MST (Multi Stream Transport) or DisplayPort 1.2 mode on your display and enable [email protected] Refer to the information provided by the manufacturer for assistance. 

If your computer is not detecting your Thunderbolt™ 3 device, try the following:

  • Update the Thunderbolt software on your Thunderbolt 3 host device.
  • Update the Thunderbolt controller NVM firmware on your Thunderbolt 3 host device.
  • Update the Thunderbolt controller drivers.
  • Update your motherboard BIOS or UEFI.

For more information about how to update the software, firmware, drivers, and BIOS or UEFI, refer to the website of the manufacturer of the Thunderbolt 3 host device. The following website includes links to some of the manufacturers of Thunderbolt 3 host devices: https://thunderbolttechnology.net/updates. If the manufacturer of your host device is not listed, you should contact the manufacturer or refer to their website for more information.

For more information about how to check which version of the Thunderbolt software and firmware you are currently using, see the following FAQ: https://www.startech.com/faq/thunderbolt-3-check-software-firmware.

For more information about Thunderbolt 3 host system and motherboard compatibility, refer to the Thunderbolt 3 Compatibility and Troubleshooting guide.

If you are only getting a single display to work with your Thunderbolt™3 device, make sure that your Thunderbolt 3 host device can support two separate DisplayPort lines over Thunderbolt 3. 

While Thunderbolt 3 supports dual monitors over a single connection, not all Thunderbolt 3 host devices are designed to meet this requirement. If your Thunderbolt 3 host device does not meet this requirement, you cannot troubleshoot this issue with software, firmware, or driver updates, and you cannot use this device to achieve dual displays over Thunderbolt 3. If you are not sure whether your Thunderbolt 3 host device supports dual monitors, contact your Thunderbolt 3 host device manufacturer.

If you confirmed that your Thunderbolt 3 host device does support dual monitors and you are only seeing a single display, see the following FAQ: https://www.startech.com/faq/thunderbolt-3-update-software-firmware.

For more information about Thunderbolt 3 host system and motherboard compatibility, refer to the Thunderbolt 3 Compatibility and Troubleshooting guide.

When you connect a Thunderbolt™ device to any Windows operating system that can support Thunderbolt 3, a pop-up message appears. To use your Thunderbolt 3 device do one of the following:

  • Select Connect Only Once.
  • Select Always Connect.

Caution! If you select Do Not Connect, only video will pass through on your Thunderbolt 3 device.

If you accidentally set a Thunderbolt™3 device to not connect to your computer when prompted by the system, you can force the software to prompt you again for authentication. To do so, complete the following:

  1. Right-click the Thunderbolt icon.
  2. Click Approve Attached Devices.
  3. Select the Thunderbolt 3 port that you want to authenticate.

To use a Thunderbolt 3 adapter to output to a display at 60Hz, your monitor must support the refresh rate and you need to set the monitor to work at 60Hz. By default, most monitors are set to DP1.1, which will not work with this Thunderbolt 3 device when you use a display at 60Hz. In most cases, you need to set your monitor's DisplayPort settings to DP1.2.

To resolve this issue, use the buttons on your monitor to change the DisplayPort settings to DP1.2. For more information about changing your monitor settings, refer to the website of the manufacturer of your monitor.

How To

To arrange extended displays on Windows 10, complete the following. 

  1. Press the Windows key+R, type desk.cpl, and press Enter. 
  2. Under the ‘Multiple Displays’ selection, select ‘Extend Desktop To This Display.’  
  3. Press ‘Identify’ to determine what number each display is assigned to. 
  4. Drag and drop each display accordingly to the physical layout on your desk.  
  5. Click the Apply button. 

To arrange extended displays on macOS, complete the following. 

  1. Navigate to the Apple Menu > System Preferences, click Displays, then click Arrangement
  2. Make sure that the ‘Mirror Displays’ checkbox is not selected. 
  3. Click on each display to determine what number each display is assigned to. 
  4. Drag and drop each display accordingly to the physical layout on your desk.  

When you connect a Thunderbolt™ device to any Windows operating system that can support Thunderbolt 3, a pop-up message appears. To use your device, complete the following:

  1. In the New Thunderbolt devices have been attached pop-up message, click OK.
  2. In the User Account Control pop-up message, click Yes.
  3. In the Approve Thunderbolt Devices pop-up message, do one of the following:
    • If you want to authorize your Thunderbolt devices every time that you connect them, select Connect Only Once in the drop-down list.
    • If you want to authorize your Thunderbolt devices only once, select Always Connect in the drop-down list.
  4. Click OK.

If you accidentally set your Thunderbolt device to Do Not Connect in step three above, refer to the following FAQ: https://www.startech.com/faq/thunderbolt-3-denied-authentication.

If you accidentally set a Thunderbolt™3 device to not connect to your computer when prompted by the system, you can force the software to prompt you again for authentication. To do so, complete the following:

  1. Right-click the Thunderbolt icon.
  2. Click Approve Attached Devices.
  3. Select the Thunderbolt 3 port that you want to authenticate.

You can use the Thunderbolt™ software to manage your Thunderbolt 3 devices on a computer running a version of Windows. To manage your Thunderbolt 3 devices, complete the following:

  1. Click Start.
  2. Type Thunderbolt and click on the search result.
  3. Right-click the Thunderbolt icon.
  4. Click Manage Approved Devices.

Before You Buy

Thunderbolt 3 uses the USB-C connector, but not all host connections, cables, and devices with a USB-C connector support Thunderbolt 3. This means that a USB-C device is compatible with a Thunderbolt 3 host connection, but a Thunderbolt 3 device is not compatible with a USB-C host connection. Therefore, it is essential to know whether you have a USB-C or a Thunderbolt 3 host, cable, or device.  

To determine if your component is a Thunderbolt 3 device, look for the Thunderbolt 3 symbol. USB-C devices do not include this symbol.  For more information about USB-C, see the following FAQ: http://www.startech.com/faq/usb-c-port-capabilites

Components

Thunderbolt™ 3 is the latest version of the Thunderbolt standard for connecting computers and electronic devices. It is capable of the following:

  • Total bandwidth up to 40Gbps. Data transfer speeds are dependent on the other features that you are using in your setup.
  • USB 3.1 Gen 2 support.
  • 4K 60Hz video on one or two separate displays.
  • 5K 60Hz video on a single display.
  • A 10 GbE network connection between two Thunderbolt 3 compatible computers.
  • Up to six devices daisy-chained from a single Thunderbolt 3 port.
  • Alternate modes, such as DisplayPort Alternate Mode (DP Alt Mode).
  • Bi-directional power delivery up to 100W (not all Thunderbolt 3 devices support power delivery).

USB-C and Thunderbolt 3

Thunderbolt 3 uses the USB-C connector, but not all host connections, cables, and devices with a USB-C connector support Thunderbolt 3. This means that a USB-C device is compatible with a Thunderbolt 3 host connection, but a Thunderbolt 3 device is not compatible with a USB-C host connection. Therefore, it is important to know whether you have a USB-C or a Thunderbolt 3 host, cable, or device.

To determine if your component is a Thunderbolt 3 device, look for the Thunderbolt 3 symbol (shown below). USB-C devices do not include this symbol.  For more information about USB-C, see the following FAQ: https://www.startech.com/faq/usb-c-port-capabilites.

Thunderbolt symbol: https://sgcdn.startech.com/005329/media/products/gallery_large/TBLT3MMXM.B.jpg.

Backwards compatibility

If you use an adapter, Thunderbolt 3 host connections are compatible with Thunderbolt 1 and Thunderbolt 2 devices. You can use the StarTech.com TBT3TBTADAP to make a Thunderbolt 3 host connections backwards compatible.

Thunderbolt 3 devices are not backwards compatible with Thunderbolt 1 and Thunderbolt 2 host connections.

Although the Thunderbolt™ 3 standard is capable of data transfer speeds up to 40Gbps, not every cable can support this bandwidth. For example, cables over a certain length or made with certain materials are only capable of data transfer speeds up to 20Gbps. 

To confirm the capability of your Thunderbolt 3 cable, refer to the information provided by the manufacturer. StarTech.com lists the capabilities of the Thunderbolt 3 cables on the individual product pages.

There are two different Thunderbolt 3 cable symbols: the 20Gbps symbol and the 40Gbps symbol. The 20Gbps symbol is composed of the Thunderbolt 3 symbol, and the 40Gbps symbol is composed of the Thunderbolt 3 symbol and the number three. These images are shown below.

Thunderbolt 3 uses the USB-C connector, but not all host connections, cables, and devices with a USB-C connector support Thunderbolt 3. This means that a USB-C device is compatible with a Thunderbolt 3 host connection, but a Thunderbolt 3 device is not compatible with a USB-C host connection. Therefore, it is important to know whether you have a USB-C or a Thunderbolt 3 host, cable, or device.

To determine if your component is a Thunderbolt 3 device, look for the Thunderbolt 3 symbol (shown below). USB-C devices do not include this symbol.  For more information about USB-C, see the following FAQ: http://www.startech.com/faq/usb-c-port-capabilites.

Thunderbolt symbol: https://sgcdn.startech.com/005329/media/products/gallery_large/TBLT3MMXM.B.jpg.

No, you cannot use this device to increase the maximum number of displays that a video card supports. For example, if your video card only supports up to three displays and you add this device to your setup, your display limit is still three displays.

If you have connected more than one of this device to the same computer and are experiencing display issues, you should make sure that your video card can support the number of displays that you are using in your setup.

Common Issues

MacBook Air, MacBook Pro 13-inch, and Mac Mini systems using the new Apple M1 chip support only a single external display over the Thunderbolt 3 ports, even when connected to a Thunderbolt 3 docking station or adapter with more than one video output. This limitation also applies to using multiple Thunderbolt or Type C display adapters on both Type C ports. This is not a limitation of StarTech.com products specifically, and Apple lists support for only one external display in the Tech Specs for Video Support on the M1 MacBook Pro 13” [external link to apple.com]. Turning off the laptop display or using clamshell mode does not change this.

One option for docking that allows more than one external display with an Apple M1-based Mac is to use a USB-C DisplayLink-based docking station or video adapter that requires a driver install. One dual monitor example is our DK30CHDDPPD, but please contact StarTech.com support for a recommendation based on your specific setup.

Please note: this single monitor limitation does not affect Intel-based Macs with Thunderbolt 3.

Compliance and safety

Compliance letters

  • RoHS
    • Language: English
  • WEEE
    • Language: English

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

Customer Reviews

(6 reviews)
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(5 Stars)

Excellent 4K Monitor Mini Thunderbolt 3 Dock

By: hubj8569 - 07/30/2018
I have been in the AV/IT Integration space for over 30 years. I found this unit easy to setup and use on my Microsoft and Apple devices. This unit is bus-powered, so there is no external power required, which is a great feature. The attached USB-C cable has an extended length of approximately 8 inches, which allows for flexibility in physical set up. The unit installs quickly and is compatible with a variety of operating systems, which I tested. What is Included: 1 - Thunderbolt 3 Dock 1 - Instruction Manual Note: “I received this product in exchange for an unbiased review.”
| Helpful?
(4 Stars)

Almost fully works with Mac

By: sschramm - 09/14/2018
I was able to connect two 4K monitors and run both at 60hz on a 15" 2016 MBP via Thunderbolt 3. The USB port works but I was not able to get the Ethernet to work. I checked the downloads section and could not find a driver.
| Helpful?
Sam, Customer Support on 9/17/2018 9:48:52 AM
Thank you for your review of TB3DKM2DP. We're sorry it hasn't fully worked for you yet. The Ethernet port on this dock is natively supported in macOS. Since it's not working for you, you may need to add the Thunderbolt Ethernet interface under "System Preferences" > "Network". If you need any further help, we encourage you to reach out to our Technical Advisors at 1-800-265-1844 or www.startech.com/chat. We're available 24 hours a day, 5 days a week, to provide support.
(5 Stars)

Fantastic little travel companion!

By: Nick_147 - 11/19/2018
Keep in mind, that this is TB-3. This is *NOT* TB-2 or USB-C. OK, the negative first: The built-in cable is WAY too short and not removable. Now to the good stuff! This thing is FAST. It just worked on my Macbook. Even driving dual-4k, transferring data via USB, and network, nothing seemed to slow down at all. It took some dings in my field bag, and got some dust and fuzz in there, but it never stopped working. Keep some of that "non-slide" shelf-liner with you and this little lightweight dock won't slide around either (being that light is a plus in my book!) I received this product in exchange for an unbiased review.
| Helpful?
(4 Stars)

Problems with macOS Mojave and the DisplayPorts

By: wolf773 - 02/22/2019
I bought this dock to use with my 2018 MacBook Pro 15", specifically for the dual DisplayPorts to connect my two 24" ViewSonic monitors. The Monitors work perfectly with my Windows 10 notebook using the DisplayPort to DVI cables. But, I can't get the MacBook to detect either one of the monitors through either DisplayPort on the dock. The USB port, and ethernet port, on the dock work flawlessly. It's definitely fast. I just wish the DisplayPorts worked.
| Helpful?
Sam, Customer Support on 2/25/2019 10:09:05 AM
Thank you for your feedback on TB3DKM2DP. We're sorry it hasn't worked for you! This docking station requires active DisplayPort video adapters, so if your existing DisplayPort to DVI cables are passive, no video will appear through them. For an active DisplayPort to DVI adapter, we suggest our DP2DVIS. If you have any questions or need any assistance, please contact our Technical Advisors at www.startech.com/support. We're available 24 hours a day, 5 days a week, to provide support.
(3 Stars)

One annoying trait

By: bhaley - 05/29/2019
This product generally works as expected and I've rarely had any issues except for one that unfortunately crops up daily. I have my MacBook Pro connected to two external monitors but have to disconnect many times a day when I take the laptop to meetings. Upon returning to my desk and reconnecting the dock, the screens may switch (left screen is now the right screen). It happens at least 50% of the time and I have go to my display settings to re-arrange them. I can't isolate what causes it and I think it's just a race situation. Whichever display the dock recognizes first is just assigned a random placement. Frustrating productivity killer.
| Helpful?
Matt, Customer Support on 6/3/2019 9:15:50 AM
We're sorry to hear the displays on our TB3DKM2DP are switching when reconnecting the dock. We recommend doing an NVRAM reset because the NVRAM controls how the displays are recognized by the Mac. The instructions for this process can be found here: https://support.apple.com/en-ca/HT204063 . If the NVRAM reset does not help or if you require any assistance, please contact us at www.startech.com/support so that we can help fix this problem for you. Our Technical Advisors are available 24 hours a day, 5 days a week to provide support.
(5 Stars)

Works as advertised

By: strundeg - 12/02/2019
Been using it for 6 months without issue, with a 2018 15" MacBook Pro. Not likely related to this product, but I found that I had to connect my third monitor on the other side of the MacBook, while using a USB-C to HDMI adapter. Might be a limitation of the MacBook that I haven't found documented anywhere else, for the number of displays it can output per side of the laptop.
| Helpful?
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