What is DisplayPort Multi-Stream Transport (MST)?
DisplayPort Multi-Stream Transport allows you to daisy chain monitors with DisplayPort 1.2 ports. Daisy chaining describes the ability to connect a series of monitors to a single video output port on your computer or docking station. This has the benefit of reducing clutter on your desk and simplifying cable management. See the image below for an example of two monitors daisy chained to a laptop.
Figure 1: DisplayPort Multi-Stream Transport Daisy Chain
Before you get started, ensure you have the following:
- 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: Not all monitors with DisplayPort 1.2 technology support DisplayPort 1.2 MST. To learn more, see the User Manual of your monitor.
NOTE: If you have a Dell TB16 Dock and a computer with Intel graphics driver version 18.104.22.16872, both monitors in the chain need to use a DisplayPort 1.2 connection.
NOTE: Daisy chaining using DisplayPort Multi-Stream Transport (MST) is supported with DisplayPort (DP) and mini-DisplayPort (mDP) cables. USB-C to USB-C daisy chaining is supported on select Dell monitors. To learn more about Multi-Stream Transport (MST) support, see the User Manual of your Dell monitor. Cables, adapters, or converters with different form factors such as USB-C to DisplayPort, USB-C to HDMI, DisplayPort to HDMI, and so on do not support daisy chaining.
Maximum achievable resolution in Daisy Chain configuration may be impacted by computer support for HBR2/HBR3 specifications. More information about computer models supporting HBR3 can be found in the following article: Dell Systems Supporting HBR3 Specifications
How to connect two monitors in a daisy chain using DisplayPort MST
To connect your personal computer to multiple monitors using DisplayPort MST:
- Verify that the video or graphics card (GPU) on your personal computer supports DisplayPort 1.2 MST.
- Connect your personal computer to the DisplayPort In connection on the first monitor.
- Connect DisplayPort Out connection on the first monitor to DisplayPort In connection on the second monitor (Figure 2).
To daisy chain more than two monitors, follow a similar sequence: The first monitor connects to the second, the second monitor connects to the third, and so on.
- Using the On-Screen Display (OSD) menu, Enable DisplayPort 1.2 on your monitor.
To learn more, see the User Manual of your monitor.
- Ensure that the last monitor in the chain has DisplayPort 1.2 mode Disabled.
Connecting two monitors in a daisy chain using DisplayPort 1.2 MST
NOTE: Use the DisplayPort cables included with your monitor. Using an incompatible DisplayPort cable may prevent the monitors from operating correctly.
Frequently asked questions
Because your GPU can only output so many pixels, the number of monitors that you can daisy chain together is limited. This limit depends on the resolution, timings, and refresh rates of the connected monitors. See the table below for some basic configuration options.
||Maximum number of monitors
|1680 x 1050
|1920 x 1080
|2560 x 1600
|3840 x 2160 (Ultra HD, 4K)
4096 x 2160 (4K x 2K)
Maximum number of monitors that you can daisy chain using DisplayPort 1.2 MST
It is possible to chain together monitors with different display resolutions. For example, one 2560 x 1600 monitor could be used with two 1920 x 1080 monitors. The last monitor in the chain could even be an older DisplayPort 1.1 monitor (which only has a DisplayPort input), so long as the other monitors all have DP 1.2 inputs and outputs.
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No, the last monitor in the chain can does not need to support DisplayPort 1.2 Multi-Stream Transport (MST). Back to top