Dell Thunderbolt Dock – WD22TB4

The Dell Thunderbolt Dock – WD22TB4 is a high-performance, modular docking station designed to maximize productivity by connecting multiple 4K displays and high-speed peripherals through a single cable.

Ports & Connectivity

The WD22TB4 is known for having one of the highest port counts in its class.

Display Support & Limits

The maximum resolution and number of monitors depend on your laptop’s DisplayPort (HBR) version.

• Maximum Single Display: Up to 5K (5120 x 2880) @ 60 Hz via Thunderbolt.

• Maximum Total Monitors: Up to 4 displays (Windows only).

Resolution Table (Common Configurations):

• HBR3 (High Bit Rate) PC (without DSC): * 3 x 4K @ 60 Hz (Requires using specific port combinations)

  • 4 x QHD (2560 x 1440) @ 60 Hz

• HBR3 PC (with DSC): * 3 x 4K @ 60 Hz + 1 x 4K @ 30 Hz

• Apple MacBooks: Limited to 2 external displays (extended mode) due to macOS lack of MST support; further displays will only mirror.

  Compatibility List

  The WD22TB4 is “industry standard compatible,” meaning it works with non-Dell systems, but offers exclusive “Super Boost” features for Dell commercial laptops.

  Fully Supported (Dell Commercial Systems):

  • Latitude: 5420, 5430, 5520, 5530, 7320, 7420, 7520, 9420, 9520, and newer (including 2024-2025 models).

  • Precision: 3561, 3571, 5560, 5570, 5760, 7560, 7760, and newer.

  • XPS: XPS 13 (9310), XPS 15 (9510), XPS 17 (9710) and newer.

  Third-Party Compatibility:

  • Apple: Certified for Mac (MacBook Air/Pro). Supports up to 90W power delivery.

  • Lenovo/HP: Compatible with systems supporting Thunderbolt 3/4 or USB-C (DP Alt Mode).

    Power & Management

    • Power Delivery (PD): * Up to 130W for Dell Commercial laptops.

    • Up to 90W for non-Dell systems (standard PD).