The catch
Plugable TBT-UDM
It has Gigabit Ethernet and 96W of certified host power. Its direct HDMI stops at the documented 4K/60 modes.
Side by side
TBT-UDM vs TBT-UDH2 from Plugable: UDH2 brings power and faster HDMI, UDM stays an option for older hosts
Quick verdict
Newer HDMI modes and 140W charging come with the TBT-UDH2, while the TBT-UDM keeps a documented single-screen fallback for older hosts. A supported modern laptop that can use the higher power, the exact high-refresh HDMI modes you need or a 2.5GbE network path is the case for the UDH2. For compatible dual 4K/60 work screens, the TBT-UDM is enough as long as 96W charging and Gigabit networking cover the job. The UDH2 does not support TB3, USB-C-only or Windows ARM hosts, nor the stated DP-MUX gaming configurations.
Before you buy
Why, and what it costs you
Leaving the charger behind works only if the laptop accepts the new power
If you carry a laptop between the office and home, you may want to leave the original charger in the travel bag. UDH2 can deliver 140W while TBT-UDM is certified for 96W, which is a 44W gap in maximum host power. The gap only helps when the laptop accepts the required PD 3.1 profile and its workload fits within the supplied power. A laptop that charges at 65W, relies on a proprietary gaming adapter or caps USB-C input will not see the full gain. Since both docks keep the same two HDMI connections and downstream TB port, power may be the one real reason to upgrade. Look up the laptop’s USB-C charging specification before you buy another dock just to fix a charger problem.
Where this comes from
The maximum host-power difference is 140 minus 96 =44W. Nothing is inferred about battery capacity, actual power draw, charge time or proprietary charging compatibility.
The catch
Plugable TBT-UDH2
TB3, USB-C-only and Windows ARM hosts are not supported. Plugable also excludes DP-MUX gaming laptops, so a gaming badge on the laptop is not enough.
Plugable TBT-UDM
- Why pick it
- On a supported host, dual 4K/60 HDMI screens do what you need, and 96W certified charging is sufficient.
- You have an older TB3 or video-capable USB-C laptop that depends on the documented single-screen fallback. Make sure the one-screen limit works for you before buying.
- The catch
- It has Gigabit Ethernet and 96W of certified host power. Its direct HDMI stops at the documented 4K/60 modes.
Plugable TBT-UDH2
- Why pick it
- Your exact host and OS support the higher-refresh HDMI modes you want, and the displays and cables match.
- A compatible 140W laptop, or a 2.5GbE NAS path that is ready to go, would fix a real limitation of your desk. Go through every host exclusion first.
- The catch
- TB3, USB-C-only and Windows ARM hosts are not supported. Plugable also excludes DP-MUX gaming laptops, so a gaming badge on the laptop is not enough.
We may earn a commission from qualifying Amazon purchases. How we make money
What this page compares
TBT-UDM vs TBT-UDH2 for two HDMI monitors, a work laptop you share and a home NAS. Set the benefits of upgrading against the host restrictions.
Each dock gives you two direct HDMI screens and one downstream Thunderbolt connection. So for a desk that is already set up, this is a real upgrade question. The new dock can leave the cable layout alone while changing the power and host support.
Which one fits
Pick the situations that sound like you
The same desk also hosts an older TB3 laptop on one screen
UDM has a documented single-screen fallback, while UDH2 excludes TB3 hosts.
- Plugable TBT-UDM
- Better fit
- Plugable TBT-UDH2
- Not suitable
A compatible laptop requires more than 96W through its host cable
With the right PD 3.1 profile, UDH2 can deliver up to 140W.
- Plugable TBT-UDM
- Caution
- Plugable TBT-UDH2
- Better fit
Each screen runs at 4K/60 and the network is Gigabit
UDH2’s newer display and network capabilities go unused with only those requirements.
- Plugable TBT-UDM
- Good
- Plugable TBT-UDH2
- Good
The host is a DP-MUX gaming laptop that is excluded
UDH2 is explicitly ruled out. UDM calls for its own check against the exact host, and you should not assume it is endorsed.
- Plugable TBT-UDM
- Depends
- Plugable TBT-UDH2
- Not suitable
In practice
Differences you will notice
Leaving the charger behind works only if the laptop accepts the new power
If you carry a laptop between the office and home, you may want to leave the original charger in the travel bag. UDH2 can deliver 140W while TBT-UDM is certified for 96W, which is a 44W gap in maximum host power. The gap only helps when the laptop accepts the required PD 3.1 profile and its workload fits within the supplied power. A laptop that charges at 65W, relies on a proprietary gaming adapter or caps USB-C input will not see the full gain. Since both docks keep the same two HDMI connections and downstream TB port, power may be the one real reason to upgrade. Look up the laptop’s USB-C charging specification before you buy another dock just to fix a charger problem.
How we worked this out
The maximum host-power difference is 140 minus 96 =44W. Nothing is inferred about battery capacity, actual power draw, charge time or proprietary charging compatibility.
Upgrading the personal desk can lock out the weekday laptop
For Thunderbolt 3 or USB-C hosts that support DisplayPort, TBT-UDM documents a single-screen fallback. UDH2 leaves those hosts out entirely. If you move between a newer personal laptop and an older work computer, upgrading could cost you a workable weekday setup. Hold on to TBT-UDM when one external screen is fine on the older machine. And if that work computer needs two screens, the fallback will not cover it, so UDM is not a full answer in that case either. Check each laptop’s protocol, OS and display requirement on its own. UDH2 gets easier to recommend once every computer you plan to use is on its support list.
How we worked this out
Manufacturer host scopes differ, and that collides with swapping between a work laptop and a personal one. The UDM fallback is explicitly limited to one external display. No dual-screen support or automatic KVM function is invented here.
Higher-refresh monitors and a faster NAS each need a separate upgrade check
Picture a home desk used for office documents on weekdays and photo editing or games at the weekend. UDH2 can add documented higher HDMI modes and 2.5GbE, yet neither gain comes automatically with the dock. Monitors that are already 4K/60 will not show a higher refresh rate simply because the output is capable of one. In the same way, a 1GbE switch caps the network link. Check the exact screen timing and the NAS route one at a time, and buy for whichever one fixes a real delay or limit. If gaming is the goal, look closely at UDH2’s host support, including the DP-MUX exclusion. A compatible graphics path matters more than assuming every Thunderbolt gaming laptop will work.
How we worked this out
Host, display and network bottlenecks meet weekday and weekend use. No prediction is made about latency, frame rate or NAS throughput. UDH2’s host-specific display table and exclusions stay in place.
Option A
Plugable, TBT-UDM
Plugable TBT-UDM
On a supported host, dual 4K/60 HDMI screens do what you need, and 96W certified charging is sufficient.
- Best for
- On a supported host, dual 4K/60 HDMI screens do what you need, and 96W certified charging is sufficient.
Facts we checked
- HDMI desk layout: Two direct HDMI outputs, up to 4K/60 each on supported hosts
- Host charging: 96W certified
- Network: Gigabit
- Spare TB connection: One downstream TB4, up to 15W
Option B
Plugable, TBT-UDH2
Plugable TBT-UDH2
Your exact host and OS support the higher-refresh HDMI modes you want, and the displays and cables match.
- Best for
- Your exact host and OS support the higher-refresh HDMI modes you want, and the displays and cables match.
Facts we checked
- HDMI desk layout: Two HDMI 2.1 outputs, higher modes depend on exact host and OS
- Host charging: Up to 140W with compatible PD 3.1 host
- Network: 2.5GbE
- Spare TB connection: One downstream TB5, up to 30W
Spec by spec
Where they really differ
| Spec | Plugable TBT-UDM | Plugable TBT-UDH2 | In practice |
|---|---|---|---|
| HDMI desk layout | Two direct HDMI outputs, up to 4K/60 each on supported hosts | Two HDMI 2.1 outputs, higher modes depend on exact host and OS | With UDH2 the connectors can stay as they are while the supported screen timing changes. |
| Host charging | 96W certified | Up to 140W with compatible PD 3.1 host | A 44W gap in maximum power does not make every laptop charge faster. |
| Network | Gigabit | 2.5GbE | The faster link only helps once the NAS path supports more than Gigabit. |
| Spare TB connection | One downstream TB4, up to 15W | One downstream TB5, up to 30W | Each dock has the same single storage branch. The upgrade adds power and protocol capability. The branch count stays the same. |
| Older host fallback | Documented single-display support for TB3 or USB-C DisplayPort hosts | TB3 and USB-C-only hosts unsupported | A shared desk needs checking against every computer that uses it. |
Trade-offs
What each pick costs you
With Plugable TBT-UDM
- Even with the dock running the monitors, a higher-power laptop may still need its original charger.
With Plugable TBT-UDH2
- Reaching 140W takes a laptop with the right PD 3.1 support. Higher screen refresh depends on the exact host, OS, cable and display. HDMI 2.1 branding alone does not guarantee it.
Change of plan
When the answer changes
Older-host fallback or a desk that is already fine at 4K/60 matters most
Go with Plugable TBT-UDM. UDM lets you keep the simpler setup you already have.
Verified power, HDMI mode or network limits call for the upgrade
Go with Plugable TBT-UDH2. On the hosts it supports, UDH2 adds those capabilities.
Decision guide
Before you buy
Faster screens or fewer chargers are welcome only if the work laptop stays compatible with the desk it uses every day.
What this page can’t tell you
- There is no winner on gaming latency, charging time or measured throughput. Native display limits on basic M1/M2 apply to both docks. Buying a passive cable with a different shape will not get around a host exclusion.
By the numbers
What the data shows
What we found across the docking stations we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Plugable TBT-UDM |
|
| |
| Plugable TBT-UDH2 |
|
|
Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Plugable TBT-UDM
On a supported host, dual 4K/60 HDMI screens do what you need, and 96W certified charging is sufficient.
You have an older TB3 or video-capable USB-C laptop that depends on the documented single-screen fallback. Make sure the one-screen limit works for you before buying.
See price & reviews on AmazonPlugable TBT-UDH2
Your exact host and OS support the higher-refresh HDMI modes you want, and the displays and cables match.
A compatible 140W laptop, or a 2.5GbE NAS path that is ready to go, would fix a real limitation of your desk. Go through every host exclusion first.
See price & reviews on AmazonEach link opens in a new tab.
We may earn a commission from qualifying Amazon purchases. How we make money