will this work with one 3440x1440 monitor and one 2560x1440 monitor? and will i be able to do over 60hz? they both do 100hz+

I'm fairly certain that you'd be pushing the limits of DisplayPort 1.2. Look at the total bandwidth being used of two monitors and if it exceeds roughly 24gbps, then the adapter won't handle it

I have my eyefinity 3 monitor setup and want to add a forth, can I use this adapter, and is it active?

Note that previous answers were from 2015. Current AMD Radeon driver software (post-Castalyst) does not support MST, and NVidia has an article on their site explicitly stating their drivers do not support MST either. MST will still work in mirrored mode when in the BIOS and on Windows boot logo, because despite AMD and NVidia not supporting MST in their drivers, they DO still build the hardware to handle all of DisplayPort 1.4's feature set.

What hz does this have with 2560x1440 monitors?

I have a 4 monitor setup, 2 of which go through the device. One at 3840x2160@30Hz, the other 1920x1080@60 Hz.

Why is this not using the whole screen. Why is there about 3 inches of my screen not being used.

We do apologize for any inconvenience. We would like to look into this with you. Please feel free to contact us at 1-800-265-1844. Our Technical Advisors are available 24 hours a day, 5 days a week to provide support. Atha, StarTech.com Support

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StarTech.com 3-Port DisplayPort 1.2 Splitter, DisplayPort to 3x DP Multi-Monitor Adapter, Dual 4K 30Hz and 1080p 60Hz Computer MST Hub, Windows Only (MSTDP123DP)

StarTech.com 3-Port DisplayPort 1.2 Splitter, DisplayPort to 3x DP Multi-Monitor Adapter, Dual 4K 30Hz and 1080p 60Hz Computer MST Hub, Windows Only (MSTDP123DP)

Product ID: 9443358

Details

Color
Black
Compatible Devices
PC
Connector Type
DVI HDMI VGA
Item dimensions L x W x H
15.2 x 3.1 x
Specific Uses For Product
personal

⚡Low CPU usage MST tech

🔆Dual 4K @ 30Hz + 1080p @ 60Hz

🖥️3 DisplayPort outputs

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Description

🚀 Triple your screen, triple your impact.

IT PRO READY - Includes Windows Layout Utility to restore app windows on reconnect—ideal for hot-desking and dynamic office setups.
CRYSTAL CLEAR VISUALS - Enjoy dual UHD 4K screens plus a 1080p display, perfect for design, coding, and immersive workflows.
PLUG PLAY SIMPLICITY - No drivers needed—just connect and elevate your productivity instantly with reliable latching connectors.
SEAMLESS COMPATIBILITY - Works with Intel, AMD, Nvidia GPUs supporting DP 1.2 MST; supports adapters for HDMI, VGA, and DVI displays.
TRIPLE DISPLAY POWERHOUSE - Expand your Windows workstation with 3 simultaneous DisplayPort monitors for ultimate multitasking.

The StarTech.com 3-Port DisplayPort 1.2 Splitter is a robust MST hub designed exclusively for Windows PCs, enabling connection of up to three monitors—two at 4K 30Hz and one at 1080p 60Hz—via a single DisplayPort output. It requires no additional drivers, supports multiple GPU brands, and includes a power adapter and IT-friendly utilities, making it a top-tier solution for professionals seeking enhanced multitasking and immersive visual setups.

Specifications

ASIN	B00JLRBB8I
Best Sellers Rank	#73 in DVI-HDMI Adapters
Brand	StarTech.com
Built-In Media	Video splitter - 3 ports
Color	Black
Compatible Devices	PC
Connector Type	DVI, HDMI, VGA
Current Rating	1.2 A
Customer Reviews	4.0 4.0 out of 5 stars (1,274)
External Testing Certification	RoHS, CE, FCC
Finish	Hdmi
Global Trade Identification Number	00065030851886
Item Dimensions	15.2 x 3.1 x 0.8 inches
Item Type Name	Signal Splitter
Item Weight	3.52 ounces
Manufacturer	StarTech.com
Mfr Part Number	MSTDP123DP
Model Number	MSTDP123DP
Number of Items	1
Number of Ports	3
Package Quantity	1
Power Plug Type	No Plug
Specific Uses For Product	personal
UPC	065030851886
Unit Count	1 Count
Warranty Description	3 Year
Warranty Type	Extended

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€ 127.79

Duties & taxes included

In stock

Sold byAmazon GERMANYDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to GERMANY.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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