In this guide
MST (Multi-Stream Transport) is a DisplayPort 1.2+ feature that lets a single cable carry multiple independent video streams to two or more monitors simultaneously — no extra video outputs required on your GPU.
- GPU and source support DisplayPort 1.2 or later with MST enabled
- You use an MST hub, a compatible dock, or daisy-chain monitors with DP in and DP out
- Total resolution across all displays fits within available bandwidth
- You are on Windows 7 or later with certified DP cables under 3 ft between monitors
- You are on macOS, which does not support MST natively
- Monitors or hubs do not have MST capability
- Combined resolution or refresh rate exceeds the cable’s bandwidth
- MST mode is disabled in GPU or monitor settings, or cables are uncertified
MST vs SST: What’s the Difference?
Standard DisplayPort uses Single-Stream Transport (SST), which sends one video signal to one display per cable. MST multiplexes several streams over the same connection, so one DP port on your GPU can feed multiple screens. Think of SST as a single-lane road and MST as a multi-lane highway using the same physical connector.
How to Set Up MST
There are two common methods:
- MST Hub: Plug a dedicated MST hub into your GPU’s DP port. The hub splits the signal into two, three, or four outputs. This is the simplest option.
- Daisy-chaining: Connect monitor 1 to the GPU, then run a DP cable from monitor 1’s DP output to monitor 2’s DP input. Not all monitors include a DP output, so check the spec sheet first.
For full setup details from Intel, see the Intel MST Reference Guide.
Bandwidth and Resolution Limits
MST does not give each monitor its own dedicated bandwidth — all displays share the total DP bandwidth. DisplayPort 1.2 supports roughly 17.28 Gbps, which comfortably handles three 1080p/60Hz displays or two 1440p/60Hz displays. Push beyond that and you will see reduced refresh rates or displays failing to light up.
| Setup | Works? | Need | Note |
|---|---|---|---|
| 3× 1080p/60Hz | Yes | DP 1.2 + MST hub | Fits within DP 1.2 bandwidth |
| 2× 1440p/60Hz | Yes | DP 1.2 + MST hub | Near bandwidth limit |
| 2× 4K/60Hz | Yes | DP 1.4 + MST hub | Requires DP 1.4 DSC support |
| Any setup on macOS | No | SST per port | macOS blocks MST |
Does USB-C Support MST?
USB-C ports that carry DisplayPort Alt Mode can support MST, but only if the host device and dock both support it. Many laptops expose only SST over USB-C. If you are connecting a multi-monitor dock via USB-C, check whether your laptop’s USB-C port supports video output and whether the dock is MST-capable.
If you are already running HDMI and want to add a second screen, it is worth knowing that USB-C to HDMI adapters use SST only — HDMI has no MST equivalent, so every HDMI display needs its own dedicated output.
Bottom line: MST in DisplayPort is the practical way to run multiple monitors from a single DP port on Windows. Make sure your GPU, hub or monitors, and cables all support DP 1.2 or later, stay within the shared bandwidth budget, and enable MST in your display settings — and you will have a clean multi-monitor setup without needing extra GPU outputs.