What is MST and SST

MST mode and SST mode are two technical terms frequently brought up within the windows and apple enthusiast communities. We created some visuals to help clear up any confusion of the two protocols.

DisplayPort is the latest display technology on the market and is generally considered to be a competitor to HDMI. The VESA specification, which describes the DisplayPort Technology lists two types of transport modes. The first is SST or Single Stream Transport. The second is MST or Multi-Stream Transport. Below are the main differences.

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What is Multi-Stream Transport (MST) Mode:
Multi-Stream Transport Mode is based on DisplayPort technology. MST mode is designed for DisplayPort 1.2 or higher video output specifications. With DisplayPort 1.2, 1.3, and 1.4, you are able to take advantage of MST mode. MST allows you to stream independent video displays from a single desktop or laptop host.
MST hubs and daisy-chain able monitors will enable multiple monitor extended capability. The GPU driver controller takes care of the additional heavy lifting. Two methods of system design can be utilized with MST, MST Hubs or Daisy Chain enabled monitors.

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What is Single Stream Transport (SST) Mode
Single Stream Transport mode is based on DisplayPort technology. SST mode allows only one external downstream device at a time through a single downstream port. It can however extend the second screen to be mirrored to other monitors. SST is supported on the macOS platforms.

MST vs. SST Transport Modes

The DisplayPort 1.2 specification includes support for two transport modes: Single-Stream Transport (SST) and Multi-Stream Transport (MST). With the introduction of MST, which combines multiple video signals into a single stream, the default method of transmitting video as a single stream to one monitor was renamed Single-Stream Transport (SST).