In this guide
A DisplayPort MST hub uses Multi-Stream Transport (a DisplayPort 1.2+ feature) to split a single DP output into multiple independent video outputs, letting you drive two, three, or four monitors from one GPU port.
- Your GPU supports DisplayPort 1.2 or later with MST enabled
- Total bandwidth fits your chosen resolutions (e.g., dual 4K@60Hz or four 1080p@60Hz)
- The hub and all connected displays support MST
- You use a compatible DP or USB-C Alt Mode cable
- Your source only supports legacy DisplayPort 1.1 (outputs mirror/duplicate instead)
- You exceed available bandwidth (e.g., triple 4K@60Hz on a single DP 1.2 port)
- Connected displays or cables do not support MST
How MST Works
Multi-Stream Transport packages multiple independent video streams into a single DisplayPort signal. The hub receives that combined signal and separates it back into individual outputs — one per monitor. Each display gets its own resolution, refresh rate, and content, just as if it were connected directly to a dedicated GPU output.
This is different from a simple DP splitter, which only mirrors one image across all screens. An MST hub gives you truly independent extended displays.
For a deeper technical overview, see the Cable Matters guide to Multi-Stream Transport.
Bandwidth: The Key Limit
A single DisplayPort 1.2 port has roughly 17.28 Gbps of usable bandwidth. Every monitor you add draws from that same pool. Here is how common setups stack up:
| Setup | Works? | Need | Note |
|---|---|---|---|
| Dual 1080p@60Hz | Yes | DP 1.2 + MST hub | Well within budget |
| Four 1080p@60Hz | Yes | DP 1.2 + MST hub | Near bandwidth limit |
| Dual 4K@60Hz | Yes | DP 1.2 + MST hub | Uses full bandwidth |
| Triple 4K@60Hz | No | DP 1.4 required | Exceeds DP 1.2 budget |
USB-C and MST Hubs
Many modern MST hubs connect via USB-C using DisplayPort Alt Mode. If your laptop or GPU has a USB-C port that carries DisplayPort 1.2 or 1.4 video, it can power an MST hub the same way a full-size DP port does. Check whether your port actually outputs DisplayPort Alt Mode — not all USB-C ports carry video. See our guide on whether USB-C supports video to confirm your port before buying a hub.
No Drivers Needed — But GPU Settings Matter
MST hubs are plug-and-play. No software is required. However, your GPU driver must have MST enabled. On some AMD and Intel systems it is on by default; a small number of systems need it toggled in display settings. NVIDIA supports MST on most modern cards but verify your specific model. If your hub only mirrors instead of extending, check the MST setting in your GPU control panel first.
MST Hub vs. Daisy-Chaining
DisplayPort also supports daisy-chaining monitors directly without a hub, provided each display has a DP-out port. An MST hub is the better choice when your monitors lack DP-out or you need more than two screens. If you are connecting to HDMI displays, you will need an MST hub with built-in conversion — standalone adapters alone will not create independent outputs. Learn more about connecting USB-C to HDMI for related adapter compatibility.
Bottom line: A DisplayPort MST hub is the simplest way to run multiple independent monitors from a single DP port. Confirm your GPU supports DP 1.2+ with MST, calculate your total bandwidth, and match your hub to your display count and resolution — then it works reliably without any extra software.