Dell Thunderbolt Dock WD22TB4 User Guide

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Display Resolution Table

WD22TB4 for Non-Thunderbolt systems

Table 1. WD22TB4 for Non-Thunderbolt systemsThe following table provides the display resolution of your docking station:
Display Port Available Bandwidth	Single Display (maximum resolution)	Dual Display (maximum resolution)	Triple Display (maximum resolution)	Quad Display (maximum resolution)
HBR2 (HBR2 x 2 lanes - 8.6 Gbps)	DP 1.4/HDMI 2.0/MFDP Type-C/TBT Type-C: 4K (3840 x 2160) @30 Hz	DP 1.4 + DP 1.4: FHD (1920 x 1080) @60 Hz DP 1.4 + HDMI 2.0: FHD (1920 x 1080) @60 Hz DP 1.4 + MFDP Type-C: FHD (1920 x 1080) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0: 1 x FHD (1920 x 1080) @60 Hz 2 x HD (1280 x 720) @60 Hz DP 1.4 + DP 1.4 + MFDP Type-C: 1 x FHD (1920 x 1080) @60 Hz 2 x HD (1280 x 720) @60 Hz	NA
HBR3 (HBR3 x 2 lanes - 12.9 Gbps)	DP 1.4/HDMI 2.0/MFDP Type-C/TBT Type-C: 4K (3840 x 2160) @30 Hz	DP 1.4 + DP 1.4: QHD (2560 x 1440) @60 Hz DP 1.4 + HDMI 2.0: QHD (2560 x 1440) @60 Hz DP 1.4 + MFDP Type-C: QHD (2560 x 1440) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0: FHD (1920 x 1080) @60 Hz DP 1.4 + DP 1.4 + MFPD Type-C: FHD (1920 x 1080) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0: 4 x SXGA (1280 x 1024) @60 Hz DP 1.4 + DP 1.4 + MFDP Type-C: 4 x SXGA (1280 x 1024) @60 Hz NOTE:The fourth display must be daisy-chained through one of the monitors connected to DP 1.4 port.
HBR3 with Display Stream Compression (DSC)	DP 1.4/HDMI 2.0/ MFDP Type-C: 4K (3840 x 2160) @60 Hz or TBT Type-C 4K (3840 x 2160) @30 Hz	DP 1.4 + DP 1.4: 4K (3840 x 2160) @60 Hz DP 1.4 + HDMI 2.0: 4K (3840 x 2160) @60 Hz DP 1.4 + MFDP Type-C: 4K (3840 x 2160) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0: QHD (2560 x 1440) @60 Hz DP 1.4 + DP 1.4 + MFPD Type-C: QHD (2560 x 1440) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0: 3 x QHD (2560 x 1440) @60 Hz + 1 x HD (1280 x 720) @ 60 Hz DP 1.4 + DP 1.4 + MFDP Type-C: 3 x QHD (2560 x 1440) @60 Hz + 1 x HD (1280 x 720) @ 60 Hz NOTE:The fourth display must be daisy-chained through one of the monitors connected to DP 1.4 port.

WD22TB4 for Thunderbolt systems

Table 2. WD22TB4 for Thunderbolt systemsThe following table provides the display resolution of your docking station:
Display Port Available Bandwidth	Single Display (maximum resolution)	Dual Display (maximum resolution)	Triple Display (maximum resolution)	Quad Display (maximum resolution)
HBR2 (HBR2 x 8 lanes - 34.5 Gbps)	DP1.4 /HDMI 2.0/MFDP Type-C/USB Type-C TB: 4K (3840 x 2160) @60 Hz	DP 1.4 + DP 1.4: QHD (2560 x 1440) @60 Hz DP 1.4 + HDMI 2.0: QHD (2560 x 1440) @60 Hz DP 1.4 + MFDP Type-C: QHD (2560 x 1440) @60 Hz DP 1.4 + TBT Type-C: 4K (3840 x 2160) @60 Hz HDMI 2.0 + TBT Type-C: 4K (3840 x 2160) @60 Hz MFDP Type-C + TBT Type-C: 4K (3840 x 2160) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0: 2 x QHD (2560 x 1440) @60 Hz + 1 x FHD (1920 x 1080) DP 1.4 + DP 1.4 + MFDP Type-C: 2 x QHD (2560 x 1440) @60 Hz 1 x FHD (1920 x 1080 DP 1.4 + DP 1.4 + TBT Type-C : 3 x QHD (2560 x 1440) @60 Hz DP 1.4 + MFDP Type-C + TBT Type-C: 3 x QHD (2560 x 1440) @60 Hz DP 1.4 + HDMI 2.0 + TBT Type-C: 3 x QHD (2560 x 1440) @60 Hz	NA
HBR3 (HBR3 x 4 lanes + HBR3 x1 - 32.4 Gbps)	DP 1.4/HDMI 2.0/MFDP Type-C/TBT Type-C: 4K (3840 x 2160) @60Hz	DP 1.4 + DP 1.4: 4K (3840 x 2160) @60 Hz DP 1.4 + HDMI 2.0: 4K (3840 x 2160) @60 Hz DP 1.4 + MFDP Type-C: 4K (3840 x 2160) @60 Hz DP 1.4 + TBT Type-C: 1 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz HDMI 2.0 + TBT Type-C: 1 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz MFDP Type-C + TBT Type-C: 1 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0: 1 x 4K (3840 x 2160) @60 Hz 2 x QHD (2560 x 1440) @60 Hz DP 1.4 + DP 1.4 + MFDP Type-C: 1 x 4K (3840 x 2160) @60 Hz 2 x QHD (2560 x 1440) @60 Hz DP 1.4 + DP 1.4 + TBT Type-C: 2 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz DP 1.4 + MFDP Type-C + TBT Type-C: 2 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz DP 1.4 + HDMI 2.0 + TBT Type-C: 2 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0 + TBT Type-C: QHD (2560 x 1440) @60 Hz DP 1.4 + DP 1.4 + MFDP Type-C + TBT Type-C: QHD (2560 x 1440) @60 Hz
HBR3 with DSC (Display Stream Compression)	DP 1.4/HDMI 2.0/MFDP Type-C/TBT Type-C: 4K (3840 x 2160) @60Hz	DP 1.4 + DP 1.4: 4K (3840 x 2160) @60 Hz DP 1.4 + HDMI 2.0: 4K (3840 x 2160) @60 Hz DP 1.4 + MFDP Type-C: 4K (3840 x 2160) @60 Hz DP 1.4 + TBT Type-C: 1 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz HDMI 2.0 + TBT Type-C: 1 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz MFDP Type-C + TBT Type-C: 1 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0: 3 x 4K (3840 x 2160) @60 Hz DP 1.4 + DP 1.4 + MFDP Type-C: 3 x 4K (3840 x 2160) @60 Hz DP 1.4 + DP 1.4 + TBT Type-C: 2 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz DP 1.4 + MFDP Type-C + TBT Type-C: 2 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz DP 1.4 + HDMI 2.0 + TBT Type-C: 2 x 4K (3840 x 2160) @60 Hz 1 x QHD (2560 x 1440) @60 Hz	DP 1.4 + DP 1.4 + HDMI 2.0 + TBT Type-C: 3 x 4K (3840 x 2160) @60 Hz + 1 x QHD (2560 x 1440) @60 Hz or 3 x 4K (3840 x 2160) @60 Hz + 1 x 4K (3840 x 2160) @30 Hz DP 1.4 + DP 1.4 + MFDP Type-C + TBT Type-C: 3 x 4K (3840 x 2160) @60 Hz + 1 x QHD (2560 x 1440) @60 Hz or 3 x 4K (3840 x 2160) @60 Hz + 1 x 4K (3840 x 2160) @30 Hz DP 1.4 + DP 1.4 + HDMI 2.0: 4 x 4K (3840 x 2160) @60 Hz NOTE:The fourth display must be a 4K DSC monitor daisy-chained through one of the monitors connected to the DP 1.4 port. DP 1.4 + DP 1.4 + MFDP Type-C: 4 x 4K (3840 x 2160) @60 Hz NOTE:The fourth display must be a 4K DSC monitor daisy-chained through one of the monitors connected to the DP 1.4 port. DP 1.4 + DP 1.4 + TBT Type-C: 4 x 4K (3840 x 2160) @60 Hz NOTE:The fourth display must be a 4K DSC monitor daisy-chained through one of the monitors connected to the DP 1.4 port. DP 1.4 + DP 1.4 + HDMI 2.0 + TBT Type-C: 4 x 4K (3840 x 2160) @60 Hz NOTE: The TBT port must be connected to a DSC-capable 4K monitor. DP 1.4 + DP 1.4 + MFDP Type-C + TBT Type-C: 4 x 4K (3840 x 2160) @60 Hz NOTE: The TBT port must be connected to a DSC-capable 4K monitor. DP 1.4 x 2 (daisy-chain) + DP 1.4 x 2 (daisy-chain): 4 x 4K (3840 x 2160) @60 Hz - all four monitors should support DSC.

Port disablement

Table 3. Port disablementThe following table provides details on the display ports that do not function with certain display ports are connected to external displays:
Ports connected to display	Ports disabled
Two DisplayPort 1.4 ports (rear) One HDMI 2.0 port (rear) One Thunderbolt 4 port (rear)	Second Thunderbolt 4 Type-C port supports data only (rear)
Two Thunderbolt 4 Type-C port (rear)	Two DisplayPort 1.4 ports (rear) One HDMI 2.0 port (rear) One USB 3.2 Gen 2 Type-C port with DisplayPort 1.4 Alt Mode

Important

NOTE:HDMI 2.0 and MFDP (Multi-Function DisplayPort) Type-C ports on the back of are toggled. HDMI 2.0 and MFDP Type-C cannot support dual monitors simultaneously. Only one of these ports can be used at a time.

NOTE:If higher resolution monitors are used, the Graphics driver makes a judgment based on monitor specifications and display configurations. Some resolutions may not be supported and so will be removed from the Windows Display Control Panel.

NOTE:Linux operating system is unable to physically turn-off built-in display, the external display numbers will be one less than the display numbers listed in above tables.

NOTE:Resolution support is also dependent on the monitor’s Extended Display Identification Data (EDID) resolution.