Why Choose HDK404-P23

Overview

HDK404-P23 quad-view diagram comparing DisplayPort MST plus HDMI for PC 1 and PC 2 with four native HDMI inputs for PC 3 and PC 4.

01

Choose MST or Native HDMI for Quad View

PC 1 and PC 2 can drive three outputs through one DisplayPort 1.2 MST connection plus a separate HDMI path for the fourth screen. PC 3 and PC 4 connect four HDMI outputs directly when the computer provides four native video signals.

HDK404-P23 supports one computer across four displays in extended or mirrored mode, or multiple computers displayed across four monitors simultaneously.

02

Four Displays, Flexible Viewing Modes

Use all four monitors with one computer in extended or mirrored mode, or display content from multiple computers across the four screens at the same time. Flexible display modes make it easy to adapt the workspace for multitasking, monitoring and multi-system workflows.

HDK404-P23 supports up to 4K 60Hz and 1080p 240Hz with QHD and ultrawide resolution options.

03

From 4K Clarity to 240Hz Smoothness

Each KVM output supports resolutions and refresh rates up to 4K@60Hz or 1080p@240Hz, with additional ultrawide and high-refresh options for work, gaming, and creative setups.

HDK404-P23 focus-lock graphic HDK404-P23 showing USB devices and audio remaining with PC 1 while the four displays switch.

04

Keep USB and Audio with the Computer That Needs Them

Lock shared USB devices and L/R audio independently so a drive, headset or other peripheral can remain assigned to one computer while the displays switch. Keyboard and mouse focus remains separate from these locks.

HDK404-P23 lock-screen graphic showing the display wall disabled until a PIN is entered on the front panel.

05

Lock the Workstation When It Must Stay Put

Use the front-panel Lock button to turn off all displays, pause audio and disable the controls. Wake the LCD and enter the configured numeric password to restore operation; the default password is 1234.

HDK404-P23 quad-monitor desk showing keyboard hotkey, front-panel and IR remote switching.

06

HDK404-P23 EDID comparison showing stable three-monitor windows and desktop icons after switching.

07

HDK404-P23 keyboard and mouse compatibility chart showing dedicated console ports, Pass-Through Mode and Legacy Emulation Mode marked as requiring a firmware update for Prime 23 series.

08

Specifications & Support

Compatibility & Input Guide

Computer Inputs — Four computers with two supported connection layouts
PC 1 and PC 2 each require one DisplayPort 1.2 MST output, one HDMI output and one USB connection. The DisplayPort path drives Displays B, C and D, while the HDMI path drives Display A. PC 3 and PC 4 each require four HDMI outputs and one USB connection.

Display Outputs — Four HDMI monitors
Connect all four displays to the HDMI outputs. A computer must provide the required active video outputs and support the selected four-display configuration.

MST & Operating-System Limits
Full extended output from the PC 1/PC 2 DisplayPort MST path requires a Windows computer with DisplayPort 1.2 MST support. macOS and Linux can use the KVM, but operating systems without MST support cannot create three independent extended displays through that single DisplayPort path.

Before You Buy — Display Requirements
Each output supports up to 3840×2160 at 60Hz 4:4:4. Displays B, C and D share the PC 1/PC 2 MST bandwidth and are limited to a maximum of two 4K60 displays plus one 4K30 display. 5120×1440 is not supported.

PC 3 / PC 4 Requirements
These inputs do not use MST. Each computer must supply four native HDMI video outputs for a full four-monitor extended desktop. Suitable active adapters may be used only when the source and adapter support the required output format.

Keyboard & Mouse
Use a wired external keyboard and mouse in the dedicated console ports for hotkeys. Pass-Through Mode supports compatible keyboard and mouse functions.

Technical Specifications

Computer Inputs: 4
PC 1 / PC 2 Connections: 1× DisplayPort 1.2 MST + 1× HDMI 2.0 + 1× USB per computer
PC 3 / PC 4 Connections: 4× HDMI 2.0 + 1× USB per computer
Display Outputs: 4× HDMI
Maximum Resolution: Up to 3840×2160 at 60Hz 4:4:4 per output
MST Maximum for Displays B/C/D: 2× 4K60 + 1× 4K30
Other Supported Formats: 3440×1440 at 100Hz; 3840×1080 at 120Hz; 2560×1440 at 120Hz; 2560×1080 at 165Hz; 1920×1080 at 240Hz
Video Standards: DisplayPort 1.2; HDMI 2.0; HDCP 2.2; MST
Display Modes: One computer across four monitors in extended or mirrored mode; independent computer selection for each monitor
Shared USB: USB 3.0 up to 5Gbps; front USB-A and USB-C support BC 1.2 data and charging up to 7.5W
Keyboard & Mouse: Dedicated USB console ports; Pass-Through Mode; Legacy Emulation Mode available through the supported Prime 23 firmware update
Audio: 3.5mm integrated microphone and L/R audio over USB
Switching Methods: Front-panel controls, IR remote and keyboard hotkeys
Power: DC 12V
Operating System Compatibility: Unix, Windows, macOS and Linux-based systems including Debian, Ubuntu, Fedora and Raspbian; MST extension requires a supported Windows/DisplayPort 1.2 source
Other Features: EDID emulation, independent USB and audio focus lock, password-protected KVM lock, color LCD menu, rack ears

Actual resolution, refresh rate and feature availability depend on the connected computers, displays, cables and system configuration.

Manuals & Downloads

HDK404-P23 User Manual
https://support.tesmart.com/hc/en-us/article_attachments/53209448232217

TESmart Support
https://www.tesmart.com/pages/contact

Included in the Box

  • 1 × TKS202-X4 KVM Switch

  • 2 × 40Gbps USB-C Cables

  • 1 × DC 20V Power Adapter

  • 1 × IR Remote Control

  • 1 × User Manual

FAQs

Visit our Help Center for more answers.

[Compatibility] What computers and monitors can I connect to HDK404-P23?

Connect four computers and four HDMI monitors. PC 1 and PC 2 use DisplayPort MST plus HDMI and USB; PC 3 and PC 4 each use four HDMI outputs plus USB.

[Compatibility] How do the PC 1/PC 2 and PC 3/PC 4 inputs differ?

PC 1 and PC 2 use one DisplayPort 1.2 MST signal for Displays B, C and D plus one HDMI signal for Display A. PC 3 and PC 4 require four native HDMI outputs for the four monitors.

[Compatibility] Which operating systems can use the MST display path?

Full three-screen extension through the PC 1/PC 2 DisplayPort path requires Windows and DisplayPort 1.2 MST support. The manual lists macOS and Linux for KVM operation, but those systems do not support MST extension through one DisplayPort connection.

[Compatibility] What resolutions and refresh rates are supported?

Each output supports up to 4K60. The PC 1/PC 2 MST path for Displays B, C and D is limited to two 4K60 outputs plus one 4K30 output; the page also lists 1440p120 and 1080p240 formats.

[Compatibility] Does HDK404-P23 support 5120×1440 monitors?

No. The current product FAQ states that 5120×1440 output is not supported. Choose a supported resolution and refresh rate that the source, monitor and cables can all provide.

[Features & Connections] What display modes are available?

Extend or mirror one computer across all four monitors, or assign a different connected computer to each output. In mixed-display mode, each monitor source can be selected independently.

[Features & Connections] What does EDID emulation do?

EDID emulation keeps display information available to connected computers, helping preserve window positions and reduce flicker, black screens and desktop rearrangement during switching.

[Features & Connections] What USB functions are available?

Connect compatible peripherals to the shared USB 3.0 ports for data transfer up to 5Gbps. The front USB-A and USB-C ports also support BC 1.2 charging for mobile devices.

[Features & Connections] How does audio work through the 3.5mm port?

Audio and microphone signals travel through the selected computer's USB connection. Choose USB Audio as the playback and recording device on the computer.

[Features & Connections] Can USB and audio stay with one computer while the displays switch?

Yes. Lock USB 3.0 devices and L/R audio independently so they remain assigned to one computer. These locks are released when the KVM is powered off.

[Features & Connections] What does the KVM lock function do?

It turns off all displays, pauses audio, dims the LCD and disables the buttons, remote and hotkeys. Press Lock again and enter the configured numeric password to restore operation; the default password is 1234.

[Setup & Switching] How do I connect PC 1 and PC 2?

For each computer, connect one DisplayPort cable for the MST path, one HDMI connection through the supplied KVM cable for Display A, and the USB connection in the same input group.

[Setup & Switching] How do I connect PC 3 and PC 4?

Connect four HDMI outputs and one USB connection from each computer to its matching input group, then connect all four KVM HDMI outputs to the displays.

[Setup & Switching] How can I switch computers and displays?

Use the front-panel controls, IR remote or keyboard hotkeys. A full switch moves the display wall to one computer, while mixed-display commands select the source for individual outputs.

[Setup & Switching] Why do Displays B, C and D initially show mirrored images?

The graphics card may default the MST outputs to duplicate mode. Open the computer display settings and change the three displays to extended mode; the source must support DisplayPort 1.2 MST.

Still need help?

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