User Manual

HD 4K resolutions. This unprecedented performance makes MST perfect for high-resolution applications such
as graphic design, gaming and medical imaging.
Note: When using a DisplayPort 1.1 video card the MSTMDP123HD will act as a splitter, automatically mirroring your video source across
all displays. Resolution limitations apply.
The MSTMDP123HD supports plug-and-play installation for a hassle-free setup and is backed by a
StarTech.com 2-year warranty and free lifetime technical support.
Note: MST shares 21.6 Gbps across all attached displays. Higher resolutions can restrict the available bandwidth for the remaining ports,
please see our guideline below for determining an ideal resolution for your setup. 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. Some monitors limit available
resolutions.
Average Resolution Bandwidth Allocation
1920x1080 (High-definition 1080p) @60hz - 22%
1920x1200 @60hz - 30%
2560x1440 @60hz - 35%
2560x1600 @60hz - 38%
3840 x 2160 (Ultra HD 4K) @30hz - 43%
Note: Exceeding 100% will reduce functionality.
Examples of Supported Resolution Configurations
Screen 1 Resolution Screen 2 Resolution Screen 3 Resolution
Total % of
Bandwidth
1920x1200 @60hz
(30%)
1920x1200 @60hz
(30%)
1920x1200 @60hz
(30%)
90%
2560x1440 @60hz
(35%)
2560x1440 @60hz
(35%)
1920x1200 @60hz
(30%)
92%
2560x1600 @60hz
(38%)
2560x1600 @60hz
(38%)
1920x1080 @60hz
(22%)
98%
3840x2160 @30hz
(43%)
1920x1200 @60hz
(30%)
1920x1080 @60hz
(22%)
95%
3840x2160 @30hz
(43%)
3840x2160 @30hz
(43%)
None
86%
Examples of Unsupported Resolution Configurations
Screen 1 Resolution Screen 2 Resolution Screen 3 Resolution
Total % of
Bandwidth
2560x1600 @60hz
(38%)
2560x1600 @60hz
(38%)
1920x1200 @60hz
(30%)
106%
3840x2160 @30hz
(43%)
2560x1600 @60hz
(43%)
1920x1200 @60hz
(30%)
116%
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