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Important operation notes

•  The USB-C port on your computer must support DisplayPort over 

USB-C (DP Alt mode) in order to work with this MST hub. 

•  MST is certified for operation with Microsoft® Windows 10, 8/8.1 

and 7 devices.

•  MST is currently not supported by other operating systems 

such as Mac OS X and Chrome OS™.

•  Other operating systems might adopt MST in the 

future. Verify MST support with your operating system 

manufacturer.

•  Operating system support is subject to change. For the 

latest requirements, please visit: 

www.StarTech.com/MSTCDP123HD.

•  After the MST hub has been connected to your computer it may 

be necessary to initiate the operation of additional displays from 

within your Windows 

Display Settings

•  The MST adapter works with HDMI cables up to 15 ft. in length. 

•  Certain graphics adapters have limited MST support and will only 

output to three displays in total. If more than three monitors are 

attached, the fourth will be disabled, including built-in laptop 

monitors or touchscreen displays. 

•  MST shares 21.6Gbps of bandwidth across all attached displays. 

Higher resolutions can restrict the bandwidth available for the 

remaining ports. Please see our guidelines below for determining 

the ideal resolution for your setup.

Quick-start guide

DE:

 Bedienungsanleitung - de.startech.com

FR:

 Guide de l'utilisateur - fr.startech.com

ES:

 Guía del usuario - es.startech.com

IT:

 Guida per l'uso - it.startech.com

NL:

 Gebruiksaanwijzing - nl.startech.com

PT:

 Guia do usuário - pt.startech.com

Manual Revision: 04/10/2019

For the latest information, technical specifications, and support for

this product, please visit www.StarTech.com/MSTCDP123HD.

Package contents

•  1 x MST hub

Requirements

•  1 x computer with:

•  DisplayPort over USB-C video support (DP Alt Mode)

•  One of the following operating systems:

•  Windows® 10 (32-bit or 64-bit)

•  Windows 8 / 8.1 (32-bit or 64-bit)

•  Windows 7 (32-bit or 64-bit)

•  3 x HDMI displays with cabling 

Operating systems are subject to change. For the latest 

requirements, please visit:

www.StarTech.com/MSTCDP123HD.

MSTCDP123HD

MST Hub - DisplayPort over USB-C to 3x DisplayPort

*actual product may vary from photos

Introduction

HDMI 

output ports

Integrated USB-C 

input cable

This MST hub enables a Windows® device that’s equipped with 

DisplayPort over USB-C™ (DP alt mode) to connect three DisplayPort 

monitors.

Product overview

Installation

This device is natively supported in compatible operating systems 

and supports plug-and-play installation. 

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