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HP Thunderbolt Dock G2 Review 2026 - Specs, Pros & Cons

7.1 Very Good
Adrian Cel By Adrian Cel

The HP Thunderbolt Dock 120W G2 is HP's older cube-shaped Thunderbolt 3 dock for business laptops, sold under part numbers 2UK37AA, 2UK37UT, and 2UK37ET. It connects through a fixed 0.7 m USB-C Thunderbolt cable and turns that single cable into dual DisplayPort 1.4, VGA, downstream Thunderbolt, USB-C, USB-A, Gigabit Ethernet, and a 3.5 mm combo audio jack. HP's data sheet lists up to 100W charging for supported HP systems and up to 75W on non-HP machines, so the 120W model fits mainstream EliteBook, ProBook, Spectre, and similar laptops better than large ZBook workstations. Display support depends heavily on the host's DisplayPort generation. With a Thunderbolt host, the dock can run dual 4K-class displays at 60Hz using DisplayPort plus the downstream Thunderbolt or USB-C video path, and newer DP 1.4 with DSC hosts can go further. With USB-C Alt Mode hosts, the same dock falls back to USB 3.0 Gen 1 speeds and lower display ceilings. The Amazon listing confirms ASIN B07F2P4CQS for the 2UK37UT#ABA version, with a 4.3-star rating from 91 reviews at the time checked. This is still a useful office dock if you have the right HP or Thunderbolt laptop, but it is not the safest universal pick in 2026.

Pros & Cons

What We Like

  • Practical business port mix with dual DisplayPort, VGA, Thunderbolt, USB-C, USB-A, Ethernet, and audio
  • Up to 100W charging for supported HP laptops through one Thunderbolt cable
  • Compact 3.9 x 3.9 x 2.7 inch cube keeps the dock footprint small
  • Enterprise features include PXE Boot, Wake-on-LAN, MAC Address Pass Through, and WLAN-LAN switching on supported systems
  • Legacy VGA output is useful in older meeting rooms and office deployments
  • No DisplayLink driver layer, so video output uses native Thunderbolt or USB-C Alt Mode paths

What Could Be Better

  • Compatibility depends heavily on the host laptop, especially for displays and enterprise manageability

    Workaround: Check HP's compatibility list and confirm the laptop's Thunderbolt or USB-C video capabilities before buying.

  • Non-HP laptops are limited to up to 75W charging

    Workaround: Use the laptop's original charger for systems that regularly draw more than 75W.

  • Fixed 0.7 m host cable is short and cannot be replaced like a normal Thunderbolt cable
  • User feedback mentions flickering displays, Ethernet dropouts, and reconnect-after-sleep behavior on some systems

    Workaround: Update dock firmware, laptop BIOS, Thunderbolt drivers, and graphics drivers. If displays stay dark after sleep, reconnecting the host cable is the common workaround.

  • No SD or microSD card reader

    Workaround: Use a USB card reader if removable media is part of your workflow.

  • 120W model is not enough for high-power ZBook workstations

    Workaround: Use HP's G2 combo-cable model for ZBooks that need more than 100W.

Display Support

Max Displays: 3
1 display (HP's detailed Thunderbolt-system table lists single 5K@60Hz support on DP 1.3 Thunderbolt hosts.)
5120x2880 @ 60Hz
1 display (Single 4K-class output is available from DisplayPort, downstream Thunderbolt, or USB-C Alt Mode on compatible hosts.)
3840x2160 @ 60Hz
2 displays (Dual 4K-class output at 60Hz is supported on Thunderbolt hosts using DisplayPort plus downstream Thunderbolt or USB-C video.)
3840x2160 @ 60Hz
3 displays (HP's January 2023 data sheet lists 3x 4K@60Hz for hosts that support DisplayPort 1.4 with Display Stream Compression. Lower-bandwidth hosts step down to QHD or FHD combinations.)
3840x2160 @ 60Hz

Ports & Connectivity

USB Ports

1x USB-C 3.2 15W
1x USB-C 3.2 15W
1x USB-A 3.0 7.5W
2x USB-A 3.0

Video Outputs

2x DisplayPort 1.4
1x VGA
1x Thunderbolt 3

Network

1x Ethernet (1 Gbps)

Audio

1x 3.5mm combo

Full Specifications

General
Manufacturer HP
Model 2UK37UT#ABA
Release Date 2018-01
Connectivity
Host Connection Thunderbolt 3
Max Data Rate 40 Gbps
Driver Required No (native)
Display Output
Max Displays 3
1x Display 5120x2880 @ 60Hz (HP's detailed Thunderbolt-system table lists single 5K@60Hz support on DP 1.3 Thunderbolt hosts.)
1x Display 3840x2160 @ 60Hz (Single 4K-class output is available from DisplayPort, downstream Thunderbolt, or USB-C Alt Mode on compatible hosts.)
2x Display 3840x2160 @ 60Hz (Dual 4K-class output at 60Hz is supported on Thunderbolt hosts using DisplayPort plus downstream Thunderbolt or USB-C video.)
3x Display 3840x2160 @ 60Hz (HP's January 2023 data sheet lists 3x 4K@60Hz for hosts that support DisplayPort 1.4 with Display Stream Compression. Lower-bandwidth hosts step down to QHD or FHD combinations.)
Ports (9+ total)
USB-C 3.2 1x (15W)
USB-C 3.2 1x (15W)
USB-A 3.0 1x (7.5W)
USB-A 3.0 2x
DisplayPort 1.4 2x
VGA 1x
Thunderbolt 3 1x
Ethernet (RJ45) 1x 1 Gbps
Audio (3.5mm-combo) 1x
Power
Power Input DC-barrel
Laptop Charging Up to 100W

Compatibility

Windows (10+)

Best-supported platform for HP firmware, manageability, and multi-monitor behavior. HP's WLAN-LAN switching note is limited to select computers running Windows 10.

macOS (10.10 (Yosemite)+)

HP's data sheet lists tested third-party MacBook Pro and MacBook Air models, including Intel and M1 machines. Display behavior still depends on Apple's external display limits and the host's Thunderbolt capabilities.

ChromeOS

HP lists tested third-party Chromebook hardware and Amazon lists Chrome OS compatibility for the 2UK37UT#ABA listing.

Known Issues

USB-C hosts without Thunderbolt

Reduced performance and display capability

Non-HP laptops needing more than 75W charging

Charging may be lower than the original adapter

HP ZBooks and mobile workstations needing more than 100W

120W dock is the wrong power tier

Unsupported HP or non-HP notebooks

Power button, wake, MAC Address Pass Through, or WLAN-LAN switching may not work

7.1 /10

Our Verdict

Very Good

The HP Thunderbolt Dock 120W G2 makes the most sense as a low-cost business dock for older HP Thunderbolt 3 fleets. The port mix is practical, the cube design saves desk space, and the dock keeps legacy VGA around for conference rooms and older monitors. It also has the enterprise basics that IT teams care about, including PXE Boot, Wake-on-LAN, MAC Address Pass Through, and WLAN-LAN switching on supported HP systems. The catch is compatibility. HP's own data sheet makes clear that charging, displays, and manageability all depend on the host laptop, and user feedback backs that up. Some owners report simple plug-and-play setups with dual displays, while others mention flickering monitors, Ethernet dropouts, fan noise, or docks that need to be reconnected after sleep. Non-HP laptops are capped at 75W charging, the fixed host cable is short, and large ZBooks should use the higher-power G2 combo-cable version instead. If you run supported HP EliteBooks or ProBooks and can buy the G2 cheaply, it is still a capable Thunderbolt 3 dock. If you are buying new for a mixed fleet, the HP Thunderbolt Dock G4 or a modern Thunderbolt 4 dock is easier to recommend.

Available at Amazon

Frequently Asked Questions

How many monitors can the HP Thunderbolt Dock G2 support?
HP's data sheet lists up to three 4K@60Hz displays on hosts that support DisplayPort 1.4 with Display Stream Compression. More typical Thunderbolt 3 setups use one or two 4K-class displays at 60Hz. USB-C Alt Mode hosts have lower limits, so check the laptop's DisplayPort generation before planning a multi-monitor setup.
Can the HP Thunderbolt Dock 120W G2 charge my laptop?
Yes, but the amount depends on the host. HP lists up to 100W charging for supported HP systems and up to 75W on non-HP machines. Larger ZBook workstations that need more than 100W should use HP's higher-power G2 combo-cable dock instead.
Does the HP Thunderbolt Dock G2 need DisplayLink drivers?
No. The dock uses native Thunderbolt 3 or USB-C DisplayPort Alt Mode video, not DisplayLink. HP still provides firmware, Ethernet, audio, and support downloads, and those updates matter for stability.
Does the HP Thunderbolt Dock G2 work with MacBooks?
HP lists tested MacBook Pro and MacBook Air models in its data sheet, including Intel and M1 systems. That does not guarantee every display setup. macOS external display limits and the host's Thunderbolt implementation still decide how many independent displays you can run.
What ports are on the HP Thunderbolt Dock 120W G2?
The dock includes two DisplayPort 1.4 ports, one VGA port, one downstream Thunderbolt 3 port, one USB-C port with DisplayPort 1.4 and 15W power out, one front USB-C port with 15W power out, three USB-A ports, Gigabit Ethernet, a 3.5 mm combo audio jack, and a fixed 0.7 m Thunderbolt host cable.

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