Daisy-chaining lets you run several monitors from a single cable out of your PC, with each display connecting to the next instead of all plugging into the graphics card. It cleans up cabling and is handy for laptops with limited ports. The technology behind it is DisplayPort Multi-Stream Transport (MST). Here is how to set it up and what it needs.
What you need first
MST daisy-chaining has strict requirements. Every monitor in the chain except the last must have a DisplayPort output (not just an input), and all monitors and your GPU must support DisplayPort 1.2 or newer. The first monitor connects to the PC; a second cable runs from that monitor’s DP-out to the next monitor’s DP-in, and so on.
| Requirement | Detail |
|---|---|
| GPU/source | DisplayPort 1.2+ with MST support |
| Middle monitors | Must have a DP output port |
| Cables | DisplayPort throughout the chain |
| Setting | Enable DisplayPort 1.2 / MST in each OSD |
| Bandwidth | Shared across all chained displays |
Step by step
Wiring and enabling MST
Connect the PC to the first monitor’s DisplayPort input. Run a DisplayPort cable from that monitor’s DP output to the next monitor’s input, and repeat. Then, in each monitor’s on-screen menu, find the DisplayPort version setting and set it to 1.2 or higher and enable MST or “daisy chain.” Many monitors default to 1.1 for compatibility, which silently breaks the chain, so this step is essential.
Configure in the OS
In Windows display settings or macOS Displays, the extra screens should appear. Arrange them and choose “extend” so each acts as a separate desktop. If a monitor mirrors instead of extends, MST is not active, so recheck the OSD version setting.
Bandwidth limits
All chained monitors share the bandwidth of that one DisplayPort link. At DisplayPort 1.2 you can typically run two 1440p 60Hz or two 1080p high-refresh displays, but not two 4K 144Hz screens. Newer DisplayPort 1.4 and 2.1, and the compression standard DSC, expand what fits, letting you chain higher resolutions and refresh rates. Note that macOS historically does not support MST for extended desktops, so daisy-chaining is mainly a Windows feature.
USB-C docks and alternatives
Many modern laptops daisy-chain over USB-C using DisplayPort Alt Mode, and some monitors act as a dock, taking one USB-C cable from the laptop and passing video out to a second screen while also charging. This is convenient but shares the same bandwidth limits as any MST chain. If daisy-chaining fights you, a DisplayPort MST hub splits one output into several and can be easier to troubleshoot than a chain, since a single failing monitor does not break every screen after it. On Macs, where extended MST is unsupported, a dedicated multi-stream dock or separate outputs is the reliable route to multiple displays.
FAQ
Why is my second daisy-chained monitor not detected?
The most common cause is a monitor OSD still set to DisplayPort 1.1; switch it to 1.2 or higher and enable MST. Also confirm the middle monitor has a true DP output and that you are extending, not mirroring, in the OS.
Can I daisy-chain 4K monitors?
It depends on bandwidth. At DisplayPort 1.2 two 4K 60Hz is at the edge and high refresh will not fit. With DisplayPort 1.4 or 2.1 plus DSC you can chain higher resolutions and refresh rates, so check your GPU and monitor’s DisplayPort version.
Bottom line
DisplayPort MST daisy-chaining runs multiple monitors from one port, but every middle monitor needs a DP output, all devices must support DisplayPort 1.2 or newer, and you must enable MST in each OSD. Remember the chain shares one link’s bandwidth, and that macOS does not support extended MST, so it is primarily a tidy, capable solution for Windows setups.
