Measured difference
Two USB-C monitors and one TB-only drive need three direct downstream branches.
- CalDigit TS5
- 3 ports
- CalDigit TS4
- 2 ports
- Comparable models
- 2 of 17
Best for this need
Two monitors and a Thunderbolt drive, with somewhere for every cable
Our pick
Plugable TBT-UDM
Start with Plugable TBT-UDM for two compatible HDMI monitors at up to 4K/60 and one Thunderbolt drive, when 96W host charging and Gigabit networking are enough. Choose TBT-UDH2 for verified higher-power or newer HDMI requirements. Choose CalDigit TS5 when both screens need direct USB-C or Thunderbolt branches. TS4 is worth considering when one screen uses DisplayPort and several older USB-A accessories must stay connected. Every choice needs a laptop that supports the intended native displays.
TBT-UDM keeps two HDMI outputs separate from one downstream TB4 port. That leaves a direct drive connection on a supported two-screen host. Its 96W certified power and Gigabit Ethernet must be sufficient for the laptop and network.
Why it fits this need
- A supported native two-screen host and exact display modes
- A video route for each monitor that leaves a downstream TB connection
- Main trade-off
- The 100W headline is 96W certified host charging. Check a high-power laptop before leaving its charger elsewhere.
- Choose Plugable TBT-UDH2 instead when
- Two HDMI screens stay, but a supported laptop needs compatible 140W charging, a verified newer HDMI mode or 2.5GbE. TB3, USB-C-only, Windows ARM and the specified DP-MUX gaming hosts are excluded.
More reasons behind this pick
- Charging, accessory and network requirements that match the rest of the desk
Choose a dock for two monitors and a Thunderbolt SSD by checking the ports left after the screens connect. Compare HDMI, USB-C and DisplayPort setups.
What the facts say
What the comparison shows
Useful conclusions from the current docking stations comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
Calculation noteThis is connector accounting for the stated direct-connection setup. TS5 has three downstream TB ports. TS4 has two plus DisplayPort, so a compatible screen can move to that separate output. Host display support remains essential, and a verified daisy chain can change the layout.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Plugable TBT-UDM | No positive match recorded for these needs |
| |
| Plugable TBT-UDH2 | No positive match recorded for these needs |
| |
| CalDigit TS5 | No positive match recorded for these needs |
| |
| CalDigit TS4 | No positive match recorded for these needs |
|
What matters in practice
How to choose for this need
Connect the screens on paper first, then check whether the Thunderbolt drive still has a port.
Two HDMI monitors make a different shortlist from two USB-C screens
TBT-UDM and TBT-UDH2 each provide two direct HDMI outputs and one downstream TB connection. Two compatible HDMI screens therefore leave the drive a direct branch. TS5 has no fixed HDMI output, but its three downstream TB ports suit two compatible USB-C screens plus the drive. A monitor with several inputs can change the better plan. Check which input supports the resolution and refresh you need before buying an adapter.
A spare USB-C data socket is not a spare Thunderbolt socket
The familiar connector shape can hide a protocol mismatch. A TB-only drive cannot be assumed to work in an ordinary USB-C data port. A dual-protocol drive may offer a USB fallback, but that needs confirmation for the exact model. TS4 and TS5 provide ordinary USB-C sockets as well as their TB ports. Those data sockets cannot replace a missing monitor connection either. Identify both the drive protocol and the screen inputs.
One DisplayPort cable can save a Thunderbolt branch
TS4 has two downstream TB ports and a separate DisplayPort output. Two screens using both TB ports would leave no direct TB connection for the drive. Moving one compatible screen to DisplayPort leaves a branch available. This can make TS4 useful for a desk full of older USB-A equipment without adding another hub. For an HDMI screen converted from TS4’s DP output, CalDigit requires an active DP-to-HDMI adapter. Check the adapter’s actual mode support.
The laptop can stop the plan before port count matters
A basic M1 or M2 Mac laptop supports one native external display through these native docks. Extra sockets do not create a second native stream. A basic M3 laptop needs the documented closed-lid arrangement for two external displays, which can require an external camera and input devices. DisplayLink is a different approach with software, permission and protected-video trade-offs. Do not buy one of these native docks expecting a driver download to add hardware it does not contain.
One cable does not promise full drive speed or enough laptop power
Screens, storage and other peripherals share the connection to the laptop. A free TB socket establishes a usable connection route, not the SSD’s advertised simultaneous throughput. TBT-UDM provides 96W certified host power and TS4 up to 98W. The two TB5 finalists offer up to 140W only with a compatible charging profile. A demanding or proprietary-charging laptop may retain its original charger. Include that cable in the desk plan instead of assuming the dock removes it.
Plan the moment you switch from work to personal use
If another laptop takes over the desk in the evening, check that host separately. TS5 excludes TB3 Windows and TBT-UDH2 excludes TB3 and USB-C-only hosts. TS4 supports qualifying TB3 Windows systems, while TBT-UDM documents a single-screen fallback for TB3 or video-capable USB-C hosts. None of those statements guarantees the same two-screen setup on both computers. Eject attached storage before disconnecting and do not treat a dock as an automatic hardware KVM.
What this comparison cannot tell you
- These recommendations compare documented connection paths, not measured storage or graphics performance.
- No dock overrides the laptop’s native display maximum. Exact host, OS, cable and peripheral compatibility remain required.
4 options
Our pick and alternatives
Plugable, TBT-UDM
Plugable TBT-UDM
Two HDMI screens can stay connected while its downstream Thunderbolt port remains available for a drive. That is a useful layout for an ordinary dual-screen work desk. Basic M1 and M2 Mac laptops still get only one native external display.
Winner whenTBT-UDM keeps two HDMI outputs separate from one downstream TB4 port. That leaves a direct drive connection on a supported two-screen host. Its 96W certified power and Gigabit Ethernet must be sufficient for the laptop and network.
Decisive facts
- Two HDMI outputs and one downstream Thunderbolt 4 port.
- Four USB-A sockets, two at 10Gb/s and two at 5Gb/s, plus one ordinary USB-C 10Gb/s.
Trade-off
The 100W headline is 96W certified host charging. Check a high-power laptop before leaving its charger elsewhere.
Plugable, TBT-UDH2
Plugable TBT-UDH2
A Thunderbolt 5 dock that keeps two HDMI monitor connections straightforward and leaves one Thunderbolt port for storage or another supported device. Its front 30W ports can help with compatible accessories. Check the host exclusions before buying for a work or gaming laptop.
Choose instead whenTwo HDMI screens stay, but a supported laptop needs compatible 140W charging, a verified newer HDMI mode or 2.5GbE. TB3, USB-C-only, Windows ARM and the specified DP-MUX gaming hosts are excluded.
Decisive facts
- Two HDMI 2.1 outputs and one downstream Thunderbolt 5 port.
- Up to 140W host power. Front Thunderbolt and front USB-C charging ports support up to 30W each.
Trade-off
Only one downstream Thunderbolt port. The ordinary USB-C data ports cannot take extra video connections.
CalDigit, TBT5-TS5-US-AMZ
CalDigit TS5
Three downstream Thunderbolt ports can leave room for two compatible USB-C screens and a fast drive without choosing a display adapter first. It is less convenient for a pile of older USB-A accessories, and its faster connection does not override the laptop’s screen limit.
Choose instead whenTwo compatible USB-C or Thunderbolt screens and a TB drive need three direct branches. Each downstream port supplies up to 15W. No fixed HDMI or DP output is included.
Decisive facts
- Three downstream Thunderbolt 5 ports with up to 15W each, plus a 140W host connection.
- Three ordinary USB-C 10Gb/s sockets, one USB-A 10Gb/s and one USB-A USB 2.0.
Trade-off
No direct HDMI or DisplayPort socket. Those screens need separate compatible video cables or adapters.
CalDigit, TS4-US 500971
CalDigit TS4
A practical desk dock when a webcam, microphone, older drives and input devices still use USB-A. Its five fast USB-A sockets and direct DisplayPort can save adapters. Check the laptop before relying on two screens or wired networking.
Choose instead whenOne monitor can use DisplayPort, leaving the two TB branches for a second screen and drive. Five fast USB-A sockets preserve older accessories, with 98W host power and exact-host limits.
Decisive facts
- Two downstream Thunderbolt 4 ports plus one DisplayPort 1.4 output.
- Five USB-A and three ordinary USB-C ports rated for 10Gb/s. Ordinary USB-C ports do not output video.
Trade-off
Host charging stops at 98W. A demanding laptop may still need its original charger.
Ready to choose?
Check the price. Read the owner reviews.
Our pick for this need
Plugable TBT-UDM
TBT-UDM keeps two HDMI outputs separate from one downstream TB4 port. That leaves a direct drive connection on a supported two-screen host. Its 96W certified power and Gigabit Ethernet must be sufficient for the laptop and network.
See price & reviews on AmazonChoose instead when
Plugable TBT-UDH2
Two HDMI screens stay, but a supported laptop needs compatible 140W charging, a verified newer HDMI mode or 2.5GbE. TB3, USB-C-only, Windows ARM and the specified DP-MUX gaming hosts are excluded.
See price & reviews on Amazon