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

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

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: 258398258

Details

Colour
Black
Compatible devices
PC
Connector type
DisplayPort
Item dimensions L x W x H
38.6 x 7.9 x 2
Specific uses for product
personal

🔆Dual 4K @ 30Hz + 1080p @ 60Hz

⚙️Driverless plug & play

🖥️3 DisplayPort outputs

€ 177.53

Duties & taxes included

In stock

Sold byAmazon FranceDelivered 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 France.

Secure transaction

Description

🚀 Triple your screens, triple your impact.

CRYSTAL CLEAR VISUALS - Enjoy dual 4K UHD displays plus a 1080p screen for stunning detail and vibrant productivity.
MAXIMIZE YOUR WORKFLOW - Leverage MST tech to extend or mirror displays without taxing your GPU or system resources.
SEAMLESS SETUP ZERO HASSLE - Driverless MST hub with latching connectors ensures rock-solid connections and instant use.
TRIPLE DISPLAY PORT POWERHOUSE - Expand your Windows workstation with 3 simultaneous DP monitors for ultimate multitasking.
UNIVERSAL DISPLAY COMPATIBILITY - Works with DP 1.2 systems from HP, Dell, Lenovo & supports adapters for HDMI, VGA, DVI.

The StarTech.com 3-Port DisplayPort 1.2 MST Hub enables Windows users to connect up to three DisplayPort monitors simultaneously, supporting dual 4K 30Hz and one 1080p 60Hz display. Designed for seamless, driverless setup with latching connectors, it maximizes productivity by extending or duplicating screens while minimizing system resource use. Compatible with major PC brands and video cards, this MST splitter is ideal for professionals seeking enhanced multitasking and superior visual clarity.

Specifications

ASIN	B00JLRBB8I
Best Sellers Rank	#48,530 in Computers ( See Top 100 in Computers ) #1,181 in USB Flash Drives
Brand	StarTech
Built-In Media	Bosch Roller Plate L-BOXX Roller
Color	Black
Compatible Devices	PC
Connector Type	DisplayPort
Current Rating	1.2 Amps
Customer Reviews	3.8 3.8 out of 5 stars (384)
External Testing Certification	RoHS, CE, FCC
Finish	Matte
Global Trade Identification Number	00027242881310, 00065030851886, 00650308518860, 00724627116912, 00724627256427, 00821594795246, 04058829180973, 05054484751373, 05054533751378, 07426101374377, 07426800529542
Input Voltage	20 Volts
Item Dimensions	38.6 x 7.9 x 2 centimeters
Item Part Number	USM64GXW
Item Type Name	StarTech.com 3-Port Multi-Monitor Adapter - DisplayPort 1.2 MST Hub - Dual 4K 30Hz & 1x1080p - Extended Mode Video Splitter Only on Windows Computers - DP to 3x DP Monitors (MSTDP123DP)
Item Weight	0.22 Pounds
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 027242881310
Unit Count	1 Count
Warranty Type	Limited

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 177.53

Duties & taxes included

In stock

Sold byAmazon FranceDelivered 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 France.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews