How to Daisy Chain Multiple Monitors Using DisplayPort Multi-Stream Transport (MST)

How to Daisy Chain Multiple Monitors Using DisplayPort Multi-Stream Transport (MST)




What is DisplayPort Multi-Stream Transport (MST)?

DisplayPort Multi-Stream Transport allows you to daisy chain monitors with DisplayPort v1.2. "Daisy chaining" is a term that describes the ability to connect a series of devices together using a single connection between each two devices. DisplayPort daisy chainable monitors have both a DisplayPort input and a DisplayPort output. The DisplayPort output connects to the next downstream monitor. This cabling arrangement, with one DisplayPort cable between each set of monitors, provides a less cluttered system configuration.

Daisy chain monitors using DisplayPort MST

Before getting started, the following is required:

  • Compatible video or graphics card (GPU) with DisplayPort 1.2 port
  • DisplayPort 1.2 MST-capable monitor
  • Latest video or graphics card (GPU) drivers
Note: DisplayPort 1.2 MST may not be supported by all monitors with DisplayPort 1.2. To learn more, refer to the User Manual of your monitor.
NOTE: When daisy chaining monitors using a Dell TB16 Dock and a system with Intel graphics driver version 25.20.100.6472, both monitors in the chain will need to use a DisplayPort 1.2 connection.
NOTE: Daisy chaining using DisplayPort Multi-Stream Transport (MST) is only supported with DisplayPort/mini-DisplayPort cables. Cables and adapters with different form factors such as USB Type-C to DisplayPort or HDMI to DisplayPort are not compatible with daisy chaining.
Display resolution Maximum number of monitors
1680 x 1050 5
1920 x 1080 3 or 4
2560 x 1600 2
3840 x 2160 (UltraHD, 4K)
or
4096 x 2160 (4K x 2K)
1
Table 1: Maximum number of monitors that you can daisy-chain using DisplayPort 1.2 MST

How to connect two monitors in a daisy chain using DisplayPort MST?

To connect your PC to multiple monitors using DisplayPort MST:

  1. Verify that the video or graphics card (GPU) on your PC supports has a DisplayPort 1.2 MST
  2. Connect your PC to the DisplayPort In on the first monitor.
  3. Connect DisplayPort Out on the first monitor to DisplayPort In on the second monitor (Figure 2).
    To daisy chain more than 2 monitors, follow a similar sequence, first monitor connects to second, second monitor to third and so on.
  4. Using the On-Screen Display (OSD) menu, Enable DisplayPort 1.2 on your monitor.
    To learn more, refer to the User Manual of your monitor.
  5. Ensure that the last monitor in the chain has DisplayPort 1.2 mode Disabled.

Figure 2: Connecting 2 monitors in a daisy chain using DisplayPort 1.2 MST

Frequently asked questions

You can daisy chain up to a set number of monitors. This set number depends on the resolution, timings, and refresh rate of the connected displays. Refer to the table below for some basic configuration options.

It is not required that all of the screens use the same resolution. For example, one 2560 x 1600 monitor could be used with two 1920 x 1080 monitors. And while all monitors in the middle of the daisy chain need to be DisplayPort v1.2 daisy-chainable (since they need the DisplayPort output), the last monitor can be an older DP 1.1 monitor (which only has a DisplayPort input). For another example, three monitors will work at either the 1680 x 1050 or 1920 x 1080 resolutions, but three monitors will not work at 2560 x 1600 or higher resolution.

Display resolution Maximum number of monitors
1680 x 1050 5
1920 x 1080 3 or 4
2560 x 1600 2
3840 x 2160 (UltraHD, 4K)
or
4096 x 2160 (4K x 2K)
1
Table 2: Maximum number of monitors that you can daisy-chain using DisplayPort 1.2 MST

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Refer to your monitor’s User Manual for instructions to enable DisplayPort 1.2 Multi-Stream Transport (MST) capabilities. By default the Dell monitors are not enabled with this feature.

It is recommended to use the DisplayPort cables included with your monitor. The DisplayPort 1.2 specification included optional support for higher bandwidths. Using an incompatible DisplayPort cable may prevent the monitors from operating correctly.

  1. In the monitor’s on screen menu (OSD), navigate to Other Settings.
  2. Change the setting for DisplayPort 1.2 to Enable.
  3. Confirm the selection.
  4. You may need to reconnect the DisplayPort cable after making this change.
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No, the last monitor in the chain can does not need to support DisplayPort 1.2 Multi-Stream Transport (MST). It will still need to fit within the set number of monitors per chain.

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Article ID: SLN293813

Last Date Modified: 04/30/2019 02:11 PM


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