Plugable TBT4-UDZ vs TBT4-UDX1 - Thunderbolt 4 Dock Comparison 2026

Plugable TBT4-UDZ vs TBT4-UDX1: same brand, very different desks

The Plugable TBT4-UDZ and Plugable TBT4-UDX1 sit close together in Plugable’s Thunderbolt 4 lineup, but they solve different problems. The TBT4-UDZ is the bigger dock for people who want as many built-in display outputs as possible. The TBT4-UDX1 is the cleaner two-monitor option for people who still want downstream Thunderbolt 4 ports for storage, USB4 devices, or a second display path.

The short verdict: the Plugable TBT4-UDZ wins on raw capability. Its product score is 8.0 versus 7.8 for the TBT4-UDX1, and the spec sheet gives it the clear edge for Windows multi-monitor desks. It supports up to four 4K@60Hz displays on compatible Thunderbolt 4 or USB4 Windows laptops, has more built-in video outputs, adds a microSD reader, and provides slightly higher host charging at 98W.

That does not make the TBT4-UDX1 a bad buy. In fact, it is the more sensible choice if your desk has two monitors and one or two Thunderbolt peripherals. The UDX1 keeps two downstream Thunderbolt 4 ports available, while the UDZ has none. That one difference changes the whole decision for a lot of real desks.

The useful way to read this matchup is not “newer versus older” or “small versus large.” It is fixed video outputs versus flexible Thunderbolt expansion. The UDZ commits its hardware to monitors. The UDX1 leaves more of the dock open for whatever Thunderbolt gear you already own.

If you are still choosing between native Thunderbolt docks and driver-based alternatives, start with our USB-C vs Thunderbolt docking station guide. For a broader ranking, see our best Thunderbolt 4 docking stations page.

Quick specs comparison

Design and desk layout

Both docks use the same broad Thunderbolt 4 idea: one cable to the laptop, external power through a DC barrel adapter, and no DisplayLink driver. The difference is where Plugable spends the bandwidth and physical space.

The TBT4-UDZ is the more aggressive desktop dock. Its YAML describes a 16-in-1 Thunderbolt 4 and USB4 quad display docking station. It has two HDMI ports and two DisplayPort ports built in, which makes monitor cabling straightforward if you are using standard desktop displays. Plugable also includes a vertical stand, useful because the dock is larger and because the host port sits on the front. That front host cable can be awkward, and the product YAML calls out cable management as a con.

The TBT4-UDX1 is simpler. It has one built-in HDMI port and two downstream Thunderbolt 4 ports. Plugable includes a USB-C to HDMI adapter in the box, so a two-HDMI-monitor desk does not require a separate purchase immediately. The front host port still matters for cable routing, but the whole port layout is less crowded. If you want a dock that leaves space for a Thunderbolt SSD or another USB4 device, the UDX1 is the better physical design.

Design winner: TBT4-UDX1 for cleaner Thunderbolt setups, TBT4-UDZ for built-in monitor cabling. The UDX1 is easier to justify on a two-display desk. The UDZ is better when the display outputs are the point.

Display support: the UDZ is built for more monitors

Display support is the biggest reason to choose the TBT4-UDZ. The YAML lists three display configurations: four 4K@60Hz displays on compatible Thunderbolt 4 or USB4 Windows systems with DP 1.4 HBR3 DSC, two 4K@60Hz displays through any two video outputs, or one 4K@60Hz display. The built-in outputs are two HDMI 2.0 ports and two DisplayPort 1.2 ports.

The TBT4-UDX1 is not trying to be that kind of dock. It supports two 4K@60Hz displays using the built-in HDMI 2.0a port plus the included USB-C to HDMI adapter on a downstream Thunderbolt 4 port. It also supports one 8K@30Hz display through a compatible downstream Thunderbolt 4 path. For a normal two-monitor desk, that is enough.

Mac support needs a careful read. Both docks are native Thunderbolt docks, not DisplayLink docks. That means they cannot bypass Apple’s base-chip external display limits. The TBT4-UDZ YAML says base M1 and M2 Macs are limited to one external display, while M1 Pro/Max and later can use dual 4K. The TBT4-UDX1 YAML says base M1 and M2 support one external display, base M3 needs clamshell mode for two displays, and Plugable lists base M4/M5 and Pro/Max systems as dual-display capable.

Display winner: TBT4-UDZ. Four 4K displays on compatible Windows systems is the deciding spec. The UDX1 is fine for two displays, but it cannot match the UDZ for monitor count.

Thunderbolt ports and expansion

This is where the TBT4-UDX1 pushes back. The TBT4-UDZ has no downstream Thunderbolt 4 ports. Its video outputs are fixed: HDMI and DisplayPort. That is convenient for monitors, but it leaves no Thunderbolt port for daisy-chaining, high-bandwidth storage, or a Thunderbolt capture device.

The TBT4-UDX1 has two downstream Thunderbolt 4 ports. Those ports can handle displays, fast storage, and USB4 devices, and each can provide up to 15W. The trade-off is power budget. Plugable’s YAML notes that host charging drops from 96W to 81W when one downstream Thunderbolt device draws power, and to 66W when two draw power. That is not a problem for every laptop, but it matters for larger machines and bus-powered peripherals.

For people with Thunderbolt storage, the UDX1 is the better dock. For people with only HDMI or DisplayPort monitors, USB accessories, Ethernet, and a card reader, the UDZ’s lack of downstream Thunderbolt is easier to accept.

Expansion winner: TBT4-UDX1. Two downstream Thunderbolt 4 ports are more flexible than the UDZ’s fixed video-only approach.

USB, networking, audio, and card readers

The TBT4-UDZ has the broader general port mix. Its YAML lists six USB-A ports, one USB-C 3.2 port, two HDMI ports, two DisplayPort ports, 2.5 Gigabit Ethernet, a 3.5mm combo audio jack, and both SD and microSD UHS-II card readers. It is the better fit if you have older USB-A accessories and want the card reader set built into the dock.

The TBT4-UDX1 has fewer general-purpose ports but better Thunderbolt flexibility. It has four USB-A ports, two USB-C 4.0 / Thunderbolt 4 downstream ports, one HDMI port, 2.5 Gigabit Ethernet, a 3.5mm combo audio jack, and one UHS-II SD card reader. It lacks microSD, and the product YAML lists that as a con.

Both docks give you 2.5GbE, which is useful if your router, switch, or NAS supports speeds above Gigabit. Both include a combo audio jack. Neither needs DisplayLink drivers.

Ports winner: TBT4-UDZ for built-in quantity, TBT4-UDX1 for Thunderbolt quality. The UDZ gives you more fixed ports. The UDX1 gives you the ports that matter most for Thunderbolt peripherals.

Charging and power budget

The TBT4-UDZ has a small headline charging advantage: 98W host Power Delivery versus 96W on the TBT4-UDX1. Both use a 135W external power adapter, and both should handle most ultraportables and many larger work laptops.

The bigger difference is how each dock spends that power. The UDZ YAML warns that laptop charging may throttle to around 60W when many high-power USB devices are connected. The UDX1 YAML is more specific about Thunderbolt accessories: host charging drops to 81W with one downstream Thunderbolt device attached and 66W with two.

If you plan to connect bus-powered Thunderbolt SSDs to the UDX1, do not assume the laptop will always receive the full 96W. If you plan to load the UDZ with multiple power-hungry USB devices, the same caution applies. For light peripherals, either dock should be fine.

Charging winner: TBT4-UDZ, narrowly. It has 98W versus 96W and no downstream Thunderbolt ports competing for that power budget. The gap is small, but it is measurable in the specs.

Compatibility and drivers

Both docks are native Thunderbolt 4 and USB4 devices with driver type listed as None. That is good news if you want to avoid DisplayLink software. It also means display support depends more heavily on the host laptop’s native GPU, Thunderbolt implementation, and Apple Silicon display limits.

The TBT4-UDZ is more demanding if you want its headline feature. Quad 4K@60Hz requires a Thunderbolt 4 or USB4 Windows laptop with DP 1.4 HBR3 DSC support. Thunderbolt 3 Windows laptops are limited to dual 4K. Mac users get up to dual 4K only on supported chips.

The TBT4-UDX1 has a simpler display target, but it still has host requirements. Plugable lists a built-in Thunderbolt 4 or USB4 port as required, and standard USB-C hosts without USB4 or Thunderbolt are not supported. Windows users may need the Realtek Ethernet driver for best wired network performance.

For more on the Mac side of this decision, see our best docks for MacBook Pro guide.

Compatibility winner: tie. Both are driverless native Thunderbolt docks, but both inherit native display limits from the laptop.

Price and value

At list price, the TBT4-UDX1 is $69.01 cheaper: $349.99 versus $419.00 for the TBT4-UDZ. That difference makes sense. The UDZ has more built-in display outputs, more USB-A, microSD, and quad-display support on compatible Windows systems. The UDX1 costs less and gives you downstream Thunderbolt ports instead.

The better value depends on what you would otherwise need to buy. If the UDX1 forces you to add more video adapters, a microSD reader, or another USB hub, the UDZ’s higher MSRP starts to look reasonable. If the UDZ forces you to add a separate Thunderbolt hub for storage or daisy-chaining, the UDX1 is the smarter buy.

Value winner: conditional. TBT4-UDZ is the better value for multi-monitor Windows users. TBT4-UDX1 is the better value for two-monitor desks that need downstream Thunderbolt.

Verdict: choose the UDZ for monitor count, choose the UDX1 for Thunderbolt expansion

The Plugable TBT4-UDZ wins this comparison because it scores higher in the product data, supports more displays, includes more built-in video outputs, offers a broader fixed port mix, and provides slightly higher host charging. If your goal is a Windows desk with three or four external 4K monitors and no DisplayLink driver, it is the obvious pick between these two.

The Plugable TBT4-UDX1 still has a clear lane. It is the dock to buy if you want a native Thunderbolt 4 setup with two 4K monitors and downstream Thunderbolt ports left over. The smaller spec sheet is not a failure. It is a different choice.

Choose the Plugable TBT4-UDZ if:

• You want up to four 4K@60Hz displays on a compatible Windows laptop
• You prefer built-in HDMI and DisplayPort outputs over adapters
• You need more USB-A ports
• You want both SD and microSD UHS-II card readers
• You do not need downstream Thunderbolt 4 ports

Choose the Plugable TBT4-UDX1 if:

• You only need one or two external displays
• You want two downstream Thunderbolt 4 ports for storage, USB4 devices, or displays
• You prefer a lower MSRP
• You can live with one built-in HDMI port and the included USB-C to HDMI adapter
• You do not need a microSD reader built into the dock

For individual details, read our Plugable TBT4-UDZ review and Plugable TBT4-UDX1 review. If you are comparing against other premium docks, the CalDigit TS4 vs Plugable TBT4-UDZ comparison is the next logical stop.