Why Choose HDK203-M24

Overview

HDK203-M24 ADV 7674 chip graphic highlighting triple 8K60 signal stability, HDMI 2.1 gaming features and built-in EDID emulation.

01

High-Bandwidth Triple Display, Built for Stability

ADV 7674 decoding and EDID emulation are designed to keep three HDMI 2.1 display paths stable under demanding bandwidth. This supports a more consistent multi-monitor experience for high-resolution creative work and high-refresh gaming.

HDK203-M24 comparison graphic showing triple 4K high-refresh HDR and VRR with smoother motion than 60Hz.

02

Triple 4K High Refresh for Immersive Work and Play

The current page highlights triple 4K120 HDR at 12-bit and up to 4K144/165 through DSC, with VRR, FVA and ALLM support for smoother motion and lower latency. Every component in the signal path must support the selected format.

HDK203-M24 two PCs three monitors

03

Dual Display Modes — Operate Three PCs Simultaneously

Operate two computers over three monitors — assign a PC to each display, and move keyboard and mouse focus between them with Right-Alt twice. Both computers stay online.

HDK203-M24 resolution chart listing 8K60, 4K and ultrawide formats plus high-refresh 1440p and 1080p modes.

04

Resolution Options for Detail and Speed

Each output supports a range of HDMI 2.1 formats. The current page lists up to 8K60, 5120×1440 at 120Hz, 4K240 through DSC, 3440×1440 at 144Hz and 1440p or 1080p at 240Hz, subject to the connected hardware and cables.

HDK203-M24 shared docking station

05

Dock Both Computers Through the KVM

One dock serves both computers: share a 1000Mbps Gigabit Ethernet connection, USB 3.0 peripherals, and integrated audio/mic ports—expanding connectivity while cutting cable clutter for a cleaner desk.

HDK203-M24 independent USB and audio focus graphic showing peripherals remaining with PC 1 while display control changes.

06

Keep USB and Audio on the Computer That Needs Them

Follow Mode normally moves shared USB devices and audio with keyboard and mouse focus. Disable it when a drive, headset or other peripheral should stay assigned to one computer while display or console control changes.

HDK203-M24 three-monitor desk showing custom hotkey, front-panel, IR remote and mouse-wheel switching.

07

HDK203-M24 EDID comparison showing stable three-monitor windows and desktop icons after switching.

08

HDK203-M24 keyboard and mouse compatibility chart comparing Pass-Through Mode, Legacy Emulation Mode and standard USB hub behavior.

09

Specifications & Support

Compatibility & Input Guide

Computer Inputs — Two HDMI/dual-DisplayPort computers
Each computer needs one HDMI output, two DisplayPort outputs and one USB connection to the matching KVM input group. Full three-monitor operation requires all three video outputs from that computer to be active.

Display Outputs — Three HDMI monitors
Connect all three monitors to the HDMI 2.1 outputs. To extend or mirror one computer across all screens, the computer and operating system must support the selected three-display configuration. Mixed-display mode can assign either computer to each output.

Before You Buy — Video Requirements
The graphics hardware, operating system, displays and cables must all support the selected HDMI 2.1/DisplayPort 1.4 resolution, refresh rate, HDR and gaming features.

Operating System Compatibility
Supports Windows, macOS and Linux, including Raspberry Pi. No driver is required for basic KVM operation, but the computer must natively support three external displays for a full extended desktop.

Keyboard & Mouse
Connect wired USB devices to the dedicated console ports for hotkeys. Bluetooth keyboards and mice are not supported. Pass-Through Mode supports advanced device functions; Legacy Emulation Mode is available for compatibility troubleshooting.

Technical Specifications

Computer Inputs: 2
Computer Connections: 2× (1× HDMI 2.1 + 2× DisplayPort 1.4 + 1× USB)
Display Outputs: 3× HDMI 2.1
Maximum Resolution: Up to 7680×4320 at 60Hz
Other Supported Formats per Output: 5120×1440 at 120Hz DSC; 3840×2160 at 240Hz DSC; 3440×1440 at 144Hz; 2560×1440 at 240Hz; 1920×1080 at 240Hz
Triple-Monitor High Refresh: Triple 4K120 HDR at 12-bit; up to 4K144/165 via DSC
Video Standards: HDMI 2.1 up to 48Gbps; DisplayPort 1.4 input; HDCP 2.3; DSC 1.2a; HDR10; Dolby Vision; VRR; FVA; ALLM
Display Modes: One computer across three monitors in extended or mirrored mode; two computers assigned across three monitors
Shared USB: USB 3.2 Gen 1 up to 5Gbps; front ports support compatible device charging
Keyboard & Mouse: Dedicated USB console ports; Pass-Through and Legacy Emulation modes
Audio: 3.5mm integrated microphone and L/R audio over USB
Network: Shared Gigabit Ethernet up to 1000Mbps
Switching Methods: Front-panel button, IR remote, keyboard hotkeys and mouse wheel
Power: DC 12V
Other Features: EDID emulation, Follow Mode / independent USB and audio routing, four fan modes, RGB lighting, UART command interface

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

Manuals & Downloads

HDK203-M24 User Manual
https://cdn.shopify.com/s/files/1/0271/3429/6200/files/HDK203-M24_HDK203_Master_24.pdf?v=1753266663

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

Included in the Box

  • 1 × HDK203-M24 KVM Switch

  • 2 × KVM Cables (HDMI + USB)

  • 4 × DisplayPort Cables

  • 1 × DC 12V 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 HDK203-M24?

Connect two computers and three HDMI monitors. Each computer needs one HDMI output, two DisplayPort outputs and one USB connection to its matching KVM input group.

[Compatibility] Which operating systems are supported?

The current product description lists Windows, macOS and Linux, including Raspberry Pi. Basic KVM operation is plug-and-play, while each computer must natively support three external displays for a full extended desktop.

[Compatibility] What is required for 8K or high-refresh 4K output?

The graphics hardware, operating system, monitors and cables must all support the selected HDMI 2.1 or DisplayPort 1.4 format. The supplied sources conflict on DSC, simultaneous 8K output count and the maximum triple-4K refresh rate, so confirm those final claims before publication.

[Compatibility] Can I use a Bluetooth keyboard or mouse?

No. The current product page states that Bluetooth keyboards and mice are not supported; use wired USB devices connected to the dedicated keyboard and mouse ports.

[Features & Connections] What three-monitor display modes are available?

Extend or mirror one computer across all three monitors, or assign either computer to each output. In mixed-display mode, use hotkeys or the controls to select each monitor source and move keyboard and mouse focus.

[Features & Connections] What does EDID emulation do?

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

[Features & Connections] What video and gaming features are supported?

The manual lists HDMI 2.1, HDCP 2.3, DSC 1.2a, HDR10, Dolby Vision, VRR, FVA and ALLM. The source, display and cables must support each feature you intend to use.

[Features & Connections] What peripherals can the computers share?

Use the USB 3.2 Gen 1 ports for compatible drives, webcams and other peripherals at up to 5Gbps. The computers can also share the 3.5mm audio/microphone connection and Gigabit Ethernet.

[Features & Connections] Can both computers share one wired network connection?

Yes. Connect the KVM LAN port to a router or network switch. Both computers can use the Gigabit Ethernet adapter through their USB connections; use USB 3.0 or faster computer ports for Gigabit performance.

[Features & Connections] What is Follow Mode?

When Follow Mode is enabled, shared USB devices and audio move with keyboard and mouse focus. Disable it when those devices should remain assigned to one computer while display or console control changes.

[Features & Connections] How do the fan modes work?

The KVM has four fan modes: off, automatic by temperature, continuous low speed and continuous high speed. Mode 2, automatic operation, is the default.

[Setup & Switching] How do I connect HDK203-M24?

Connect one HDMI cable, two DisplayPort cables and one USB cable from each computer to its matching input group. Then connect all three HDMI monitors, keyboard, mouse, optional shared peripherals, audio and LAN, and DC 12V power.

[Setup & Switching] How can I switch between computers?

Use the front-panel input button, IR remote, keyboard hotkeys or mouse-wheel switching. In mixed-display mode, select the source for each monitor separately; mouse-wheel switching is disabled by default.

[Setup & Switching] What is the default hotkey trigger?

The default trigger is Right-Ctrl. Press it twice, then enter the command; the keyboard must be connected to the dedicated keyboard and mouse port.

[Setup & Switching] What should I try if hotkeys or the mouse do not work correctly?

Confirm the keyboard and mouse are connected to the dedicated console ports. If Pass-Through Mode has compatibility issues, switch to Legacy Emulation Mode; advanced driver-based features are unavailable in that mode.

[Setup & Switching] What should I try if hotkeys or the mouse do not work correctly?

Confirm the keyboard and mouse are connected to the dedicated console ports. If Pass-Through Mode has compatibility issues, switch to Legacy Emulation Mode; advanced driver-based features are unavailable in that mode.

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