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Laptop · Linked documentation; see the review date in the device guide · Documentation-based, not hands-on testing
Connect this model to your dock
Use the exact dock and power supply named below. These are documentation-based starting arrangements, not hardware tests or a guarantee of combined screen modes.
ThinkPad Universal Thunderbolt 4 Dock / 40B00135US
Windows 11; machine types 21KC / 21KD. Match the full dock part number. Other OS configurations need a separate check.
Before connecting: Lenovo lists this exact machine-type and dock combination. That listing does not specify the simultaneous monitor outputs and modes.
- Computer connection
- Use the specified Thunderbolt dock computer cable with a host Thunderbolt 4 port.
- Power supply and charging
- Host specification lists 45 W and 65 W USB-C supply options. The dock part number and power-brick rating do not establish delivered laptop power; confirm the dock manual and keep the laptop charger available.
- Screen modes
- The host’s display ceiling does not establish simultaneous modes through this dock.
If picture or charging fails
- If there is no picture, verify the monitor input and test that monitor and cable separately before adding another screen.
- If a second screen fails, record the two requested modes and check the dock’s simultaneous-output table. A working single display does not prove the pair.
- If charging is slow, compare the actual dock supply with the laptop’s original adapter. Use the supported laptop charger while the dock’s delivered power is unresolved.
Follow the no-display checks · Other connection problems
Still needs confirmation: Exact dock cable specification, supply-to-host power limit and simultaneous-output table still require confirmation. No multi-screen schematic is asserted here. Exact monitor combination, firmware, sleep/wake and charging under your workload remain unverified.
Check this exact setup · Dock details
Manufacturer references and scope
Reviewed 2026-09-18. Manufacturer lists the named pairing; monitor modes and delivered power still need their own checks.
Dock options for this exact device
Check model-specific limits
- Screens
- Check combined screen modes
- Charging
- Up to 98 W
- Software
- No DisplayLink for video
- Cables
- Thunderbolt host cable + screen cables. HDMI screens need suitable video adapters.
Full conditions & sources
The documented video port meets the dock’s host requirements. Confirm display count and peripherals; USB-C fallback has reduced features.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Needs DisplayLink software
Discontinued; retained for existing equipment. This UD-6950H does not charge the laptop.
- Screens
- 2 screens, up to 4K60
- Charging
- Does not charge the laptop
- Software
- DisplayLink required
- Cables
- Dock USB host cable + HDMI/DisplayPort cables, one per display group. Separate laptop charger.
Full conditions & sources
Requires DisplayLink installation and permission. Use a separate charger; check workload limitations.
Needs DisplayLink software. This is a shortlist, not a test of your complete desk.
Needs DisplayLink software
Units before January 2025 deliver up to 60 W; updated units deliver up to 100 W. The rear label and included supply distinguish them.
- Screens
- Up to 3 screens; mixed resolutions
- Charging
- Up to 100 W
- Software
- DisplayLink for screens 2–3
- Cables
- Included USB-C host cable; bring one HDMI cable per screen. Check the 60 W / 100 W rear label.
Full conditions & sources
HDMI 1: up to 4K30. HDMI 2/3: Full HD with DisplayLink. Check installation permission.
Needs DisplayLink software. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- Mac: 1 or 2 screens by chip and lid state. Windows: up to 4 on an appropriate host; check the combined modes.
- Charging
- Up to 100 W advertised; 98 W certified. Confirm actual host delivery.
- Software
- No DisplayLink for video
- Cables
- Included 1 m Thunderbolt 4 host cable; bring HDMI/DisplayPort cables. On supported two-screen Macs, use one output per group.
Full conditions & sources
Mac: 1 or 2 screens by chip and lid state. Windows: up to 4 on an appropriate host; check the combined modes. Host-port evidence only; combined screen modes and charging remain unconfirmed.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- Up to 2 screens on supported Thunderbolt 4 / USB4 hosts. Base M1/M2 MacBooks: 1. Base M3 guidance conflicts.
- Charging
- Up to 100 W advertised; 96 W certified. Confirm actual host delivery.
- Software
- No DisplayLink for video
- Cables
- Thunderbolt host cable + HDMI cables, or a confirmed downstream Thunderbolt video adapter.
Full conditions & sources
Up to 2 screens on supported Thunderbolt 4 / USB4 hosts. Base M1/M2 MacBooks: 1. Base M3 guidance conflicts. Host-port evidence only; combined screen modes and charging remain unconfirmed.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Needs DisplayLink software
Two revisions share this name: black V1 (Aug 2022–Aug 2024) and silver V2 (serial 4157+, Aug 2024 onward). Identify yours before using port guidance.
- Screens
- 2 DisplayLink screens, up to 4K60 each, subject to software, monitor and cable requirements.
- Charging
- Up to 100 W to a compatible USB-C charging host; negotiation and workload still matter.
- Software
- DisplayLink required
- Cables
- Included USB-C host cable; bring one HDMI/DisplayPort cable per logical display group.
Full conditions & sources
2 DisplayLink screens, up to 4K60 each, subject to software, monitor and cable requirements. Host-port evidence only; combined screen modes and charging remain unconfirmed. DisplayLink installation and OS permission are required. Check protected-video and demanding-graphics limitations.
Needs DisplayLink software. This is a shortlist, not a test of your complete desk.
Check model-specific limits
Discontinued — reference for equipment you already own or a used unit.
- Screens
- Up to 2 HDMI screens on Windows; high-refresh modes depend on the host. Not recommended for Macs.
- Charging
- Up to 100 W advertised. Use the specified supply and host cable.
- Software
- No DisplayLink for video
- Cables
- Specified USB4 host cable + HDMI cables.
Full conditions & sources
Discontinued: useful for an existing desk, not a current product recommendation. Up to 2 HDMI screens on Windows; high-refresh modes depend on the host. Not recommended for Macs. Host-port evidence only; combined screen modes and charging remain unconfirmed.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- 4 external screens maximum; exact modes need checking
- Charging
- Up to 100 W USB-C host delivery; 120 W names the supply, not laptop delivery.
- Software
- No DisplayLink for video
- Cables
- Attached Thunderbolt host cable + screen cables for the selected HDMI, DP or USB-C video outputs.
Full conditions & sources
Do not transfer the 280 W combo-cable model’s workstation charging claim to this 120 W USB-C model. Up to four 4K displays is host-dependent. Check DP 1.4 DSC, output combinations and the exact OS. This shortlist connects documented specifications; confirm the exact screen modes and charging.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- 3 external screens maximum; exact modes need checking
- Charging
- Up to 96 W to the host; the 150 W adapter rating is not delivered laptop power.
- Software
- No DisplayLink for video
- Cables
- Thunderbolt host cable + HDMI cables or a downstream Thunderbolt video adapter.
Full conditions & sources
The phrase “Triple 4K” is conditional. ASUS requires suitable input capabilities and DSC compression for the stated three-screen arrangement. Two HDMI outputs plus downstream Thunderbolt. Triple 4K60 requires the stated host and DSC conditions. This shortlist connects documented specifications; confirm the exact screen modes and charging.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- 2 external screens maximum; exact modes need checking
- Charging
- Up to 87 W host charging; check the unit’s firmware and supplied adapter.
- Software
- No DisplayLink for video
- Cables
- Thunderbolt host cable + DisplayPort and downstream Thunderbolt video paths. HDMI needs adapters.
Full conditions & sources
The ordinary USB-C ports are data-only. The spare Thunderbolt port is the second video route. Up to two 4K60 screens on a suitable Thunderbolt host. Base-M1/M2 laptop native limits still apply. This shortlist connects documented specifications; confirm the exact screen modes and charging.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- 2 external screens maximum; exact modes need checking
- Charging
- Up to 60 W host charging. The 150 W supply also powers hub functions and peripherals.
- Software
- No DisplayLink for video
- Cables
- Thunderbolt host cable + USB-C video cables/adapters; no built-in HDMI or DisplayPort sockets.
Full conditions & sources
Three downstream sockets do not create three independent native screens. The display table and host’s native count still control the result. Up to two displays on supported hosts. HDMI and DisplayPort screens need suitable USB-C video adapters. This shortlist connects documented specifications; confirm the exact screen modes and charging.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- 3 external screens maximum; exact modes need checking
- Charging
- Up to 100 W through the host port; use the included 180 W supply and specified USB4 cable.
- Software
- No DisplayLink for video
- Cables
- Specified USB4 host cable + HDMI/DisplayPort screen cables.
Full conditions & sources
Three screens at 4K30 is different from three at 4K60. Write down both resolution and refresh rate before choosing this dock. Windows 10 or later; Anker excludes MacBooks. Triple-display guidance specifies up to 4K30. This shortlist connects documented specifications; confirm the exact screen modes and charging.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- 1 external screen maximum; exact modes need checking
- Charging
- Up to 100 W dynamic host charging; confirm delivery with the accessories you use.
- Software
- No DisplayLink for video
- Cables
- USB-C video-capable host cable + one HDMI screen cable.
Full conditions & sources
This product combines a monitor stand and a single-display dock. It does not provide a second native video output. One HDMI 2.0 output, up to 4K60 with a suitable host, monitor and cable. This shortlist connects documented specifications; confirm the exact screen modes and charging.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
- Screens
- 2 external screens maximum; exact modes need checking
- Charging
- Up to 100 W advertised; 96 W certified host delivery. Confirm a strict 100 W requirement.
- Software
- No DisplayLink for video
- Cables
- Thunderbolt host cable + HDMI cable; second HDMI screen uses a downstream Thunderbolt adapter.
Full conditions & sources
One built-in HDMI port is sufficient for the documented two-HDMI-screen arrangement because the second screen uses a downstream Thunderbolt adapter. Up to two 4K60 screens on a suitable host. Use HDMI plus a downstream Thunderbolt video route. This shortlist connects documented specifications; confirm the exact screen modes and charging.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Check model-specific limits
Original (Nov 2017–May 2022) and updated (June 2022 onward) units have different ports, link speed, charging and display layouts.
- Screens
- 3 external screens maximum; exact modes need checking
- Charging
- Up to 100 W advertised; 96 W certified. The front USB-C port serves accessories.
- Software
- DisplayLink for screens 2–3
- Cables
- Updated unit: included 1 m USB-C host cable; bring one HDMI/DisplayPort cable per numbered group.
Full conditions & sources
Choose one socket from each numbered group. Six video sockets represent three display groups, not six independent screens. Display 1 uses native USB-C video; Display 2 and 3 use DisplayLink. Up to 4K60 per group with the required host and software. This shortlist connects documented specifications; confirm the exact screen modes and charging.
Check model-specific limits. This is a shortlist, not a test of your complete desk.
Host limits before choosing a Lenovo dock
| Check | For this setup |
|---|
| Exact model | ThinkPad X1 Carbon Gen 12. Do not transfer this generation’s specification to the next one. |
|---|
| Computer video ports | Two Thunderbolt 4 USB-C video ports and HDMI. |
|---|
| Display count | The PSREF lists the built-in display plus three external monitors across supported routes. This is not three screens guaranteed through any one dock. |
|---|
| One HDMI screen | The laptop’s own HDMI output is listed up to 4K60. A direct HDMI cable is a useful check when the dock route fails. |
|---|
| Charging | Lenovo lists 45 W and 65 W USB-C supply options. Read your adapter label rather than assuming every configuration needs the same power. |
|---|
| Combined dock modes | Use the exact dock’s output table. Individual host maxima do not establish three simultaneous high-resolution dock outputs. |
|---|
See the cable arrangement and troubleshooting steps
Device-specific limits
Check this model’s documented connection requirements and the conditions attached to each dock option.
Documented direct connection: Thunderbolt 4 USB-C video port.
Check one screen without a dockBefore choosing a dock
- Match the entire device name, including processor, generation and chassis variant.
- Record your screen models, inputs and intended resolutions and refresh rates.
- Confirm those screens work together through the proposed dock outputs.
- Check the supplied power adapter, laptop charging requirement and software permission.
Read the relevant setup guide · Fix a connection problem
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