Head-to-Head: Plugable UD-MSTH3 vs. StarTech Triple 4K USB-C Docking Station (DK31C2DHSPD)

At first glance, the Plugable UD-MSTH3 and StarTech DK31C2DHSPD have a lot in common. Both are driverless USB-C docking stations for Windows and ChromeOS computers. Both connect through a 10Gbps USB-C host connection, support up to three external displays through Alt Mode and Multi-Stream Transport (MST), deliver up to 100W of laptop charging, and add USB, Ethernet, audio, and memory-card connectivity.

What separates them is how each manufacturer prioritizes those capabilities, from triple-monitor support to networking, USB connectivity, accessory charging, and display outputs.

Quick Specs at a Glance

Display Specifications: Recommended Configuration vs. Maximum Capability

Both docks support two 4K displays at 60Hz on compatible computers. The difference shows up when you add a third monitor.

StarTech prominently advertises three 4K displays at 30Hz on a compatible DisplayPort 1.4 HBR3 computer with Display Stream Compression (DSC). Plugable instead recommends one 4K display at 60Hz plus two 1080p displays at 60Hz, keeping all three screens at a consistent 60Hz on computers with an Intel 12th Gen, AMD Ryzen 6000-series, or newer processor.

That recommendation isn't the UD-MSTH3's ceiling. On select computers with DisplayPort 1.4 and DSC, it can drive three 4K displays, depending on the host's DSC compression ratio:

In Plugable's testing, most fully compatible computers ran two 4K displays at 60Hz plus a third at 30Hz. Others, including some higher-end systems, were limited to one 60Hz display and two 30Hz displays. Independent testing has gone further: in an October 2026 How-To Geek review of the UD-MSTH3, the reviewer ran three 1440p displays at 100Hz. That isn't guaranteed on every system, and it doesn't support three 4K displays at 60Hz because there isn't enough bandwidth for all three at once. For full details, see Will the UD-MSTH3 Support Three 4K Displays?

Why Doesn't Plugable Lead With Triple 4K?

Maximum display configurations depend heavily on the connected computer: its DisplayPort link rate (such as HBR2 or HBR3), whether it supports DSC, and which compression ratio it uses. Laptop manufacturers rarely document these details, and Windows and ChromeOS don't expose them, so two computers that look similar on paper can deliver different results on the same dock.

StarTech's triple 4K claim comes with the same host-side requirements. Without DSC, StarTech publishes a triple-display maximum of three 1080p screens at 60Hz on an HBR3 system, and it recommends a laptop with a discrete graphics processor for dual 4K at 60Hz and triple 4K at 30Hz. On some systems limited to three displays total, you may also need to disable the laptop's internal screen.

So the distinction isn't that StarTech supports three 4K monitors and Plugable doesn't. Both docks can run triple 4K on suitable hardware. StarTech leads with a conditional maximum. Plugable leads with a configuration more customers can reliably achieve and documents the higher-resolution options separately. For more on the underlying technology, see Exploring DisplayPort: DP Alt Mode, MST, DSC, and Key Advancements in Video Connectivity.

Display Performance: Resolution and Refresh Rate

Resolution determines how much detail a display shows. Refresh rate determines how often that image updates. A 30Hz display refreshes 30 times per second, while a 60Hz display refreshes twice as often, making cursor movement, scrolling, dragging windows, and switching between applications noticeably smoother. Across a full workday spent on three monitors, that difference adds up.

A 30Hz display is still perfectly usable for relatively static content like dashboards, reference documents, or monitoring tools, and some users will value three high-resolution desktops over smoother motion. For most productivity workstations, though, Plugable's recommended setup strikes a more practical balance: a sharp 4K primary display for detailed work, two 1080p screens for email, chat, meetings, and reference material, and all three running at 60Hz.

Three HDMI Outputs Simplify Deployment

The UD-MSTH3 includes three HDMI outputs. With the same connector on every display, users and IT teams work with one type of monitor cable, one connection diagram, and one replacement process. That consistency pays off across offices, classrooms, computer labs, and shared desks.

The StarTech DK31C2DHSPD provides two DisplayPort 1.4 outputs and one HDMI 2.0 output. That suits desks already standardized on DisplayPort monitors. For an HDMI-based workstation, though, you'll need DisplayPort-to-HDMI cables or adapters for two of the three displays, while the UD-MSTH3 connects all three directly.

Networking: 2.5 Gigabit Ethernet Provides More Headroom

The UD-MSTH3 includes 2.5 Gigabit Ethernet, offering up to 2.5 times the theoretical link speed of StarTech's Gigabit Ethernet on compatible network equipment. That extra bandwidth helps with large file transfers to network-attached storage, network backups, shared creative assets, and internet service faster than 1Gbps. It's also backward compatible with Gigabit and slower networks, so upgrading the dock doesn't require upgrading the whole network.

StarTech's dock does offer PXE Boot support, which can be valuable for IT teams managing network-based system deployment and recovery. However, for users who prioritize faster network performance and more bandwidth for future needs, the Plugable UD-MSTH3 offers a clear advantage.

USB Expansion: More High-Speed Ports

Both docks provide six downstream USB data ports, including two 10Gbps USB-C ports and two 5Gbps USB ports. The difference is the remaining two: the UD-MSTH3 adds a 10Gbps USB port and one USB 2.0 port, while the StarTech adds two USB 2.0 ports.

That third 10Gbps port gives you another fast connection for external SSDs, high-resolution webcams, capture devices, and other higher-bandwidth USB peripherals. StarTech's extra USB 2.0 port will generally be better used for a basic keyboard, mouse, printer, or wireless receiver. All ports share the dock's 10Gbps host connection, so three 10Gbps ports don't add up to 30Gbps, but more high-speed ports mean fewer moments spent checking which port a fast device is plugged into.

Charging: 100W for the Laptop and 30W for Another Device

Both docks deliver up to 100W of USB-C Power Delivery to a compatible laptop. The StarTech supports BC 1.2 Fast Charge through its two USB-C data ports, which supports up to 7.5W charging. However, the UD-MSTH3 adds a dedicated front USB-C Power Delivery port that can fast-charge a phone, tablet, or any USB-C device at up to 30W without tying up either of its 10Gbps USB-C data ports. That’s four times the charging power, enough to fast-charge a phone or tablet while you work.

The charging port shares the dock's total power with the host. With no accessory connected, the laptop receives up to 100W. At the highest accessory allocation, the dock provides up to 30W to the device and up to 85W to the laptop.

Built-In SD and microSD Card Readers

Both docks include a full-size SD UHS-I card reader. The UD-MSTH3 adds a separate microSD UHS-I slot, which is handy for drones, action cameras, development boards, and other devices that use microSD storage. With StarTech, you need an adapter or a separate USB reader for a microSD card.

IT Deployment, Warranty, and Support

Both docking stations offer advantages for business and IT environments, but they approach workstation deployment differently.

The Plugable UD-MSTH3 is well suited for organizations deploying standardized, multi-monitor workstations. Its three matching HDMI outputs simplify cabling and monitor setup across multiple desks, while 2.5GbE networking and additional high-speed USB connectivity provide flexibility for evolving workplace needs. Dedicated USB-C charging, built-in SD and microSD readers, and flexible horizontal or vertical positioning further reduce the need for additional accessories and help accommodate different workstation layouts.

StarTech offers additional IT-specific features, including PXE Boot and its Connectivity Tools software.

Both manufacturers provide lifetime technical support. Plugable backs the UD-MSTH3 with a two-year limited warranty, while StarTech offers a three-year warranty.

Which Dock Should You Choose?

Choose the Plugable UD-MSTH3 if you want:

• A practical triple-display configuration with all three screens running at 60Hz
• Higher-resolution triple-display options on select DSC-capable computers
• Three matching HDMI outputs
• 2.5 Gigabit Ethernet
• Three 10Gbps USB data ports
• A dedicated front USB-C charging port with up to 30W Power Delivery
• Separate SD and microSD card readers
• Flexible horizontal or vertical positioning

The StarTech DK31C2DHSPD may be a better fit if:

• Three 4K displays at 30Hz is your priority, and your computer meets the requirements
• Your monitors primarily use DisplayPort
• Your deployment requires PXE Boot or StarTech Connectivity Tools
• A three-year warranty is a requirement

Final Verdict

For the broader productivity workstation, we favor the Plugable UD-MSTH3. Its recommended triple-monitor setup keeps all three displays at 60Hz while retaining a high-resolution primary screen. On capable DSC-enabled computers, it can go further, driving three 4K displays, with two at 60Hz.

Beyond displays, the UD-MSTH3 adds three matching HDMI outputs, 2.5GbE, a third 10Gbps USB port, a dedicated 30W USB-C charging port, and a microSD reader. No single difference decides the comparison, but together they make the UD-MSTH3 the more complete dock for buyers who value smooth multi-monitor performance, versatile connectivity, and straightforward deployment.