Dell ThunderDock WD22TB4 - Manual (Page 13)

3. Under the Multiplay displays section, modify the display configuration as needed.
NOTE: The display topology can be configured, by moving around the displays in the " Select and rearrange displays "
section, to change where the operating system assumes these monitors are located.
Display bandwidth
External monitors require a certain amount of bandwidth to work properly. Monitors with higher resolution require more
bandwidth.
● DisplayPort High Bit Rate 2 (HBR2) is 5.4 Gbps maximum link rate per lane. With DP overhead, the effective data rate is 4.3
Gbps per lane.
● DisplayPort High Bit Rate 3 (HBR3) is 8.1 Gbps maximum link rate per lane. With DP overhead, the effective data rate is 6.5
Gbps per lane.
Table 1. Display bandwidth
Resolution Minimum bandwidth required
1 x FHD (1920 x 1080) display @60 Hz 3.2 Gbps
1 x QHD (2560 x 1440) display @60 Hz 5.6 Gbps
1 x 4K (3840 x 2160) display @30 Hz 6.2 Gbps
1 x 4K (3840 x 2160) display @60 Hz 12.5 Gbps
Setup of External Monitors 13