StarTech SV431DHD4KU 4-Port Dual-Monitor 4K HDMI KVM Switch

Overview

The StarTech SV431DHD4KU is a four-port, dual-monitor KVM switch that lets you control up to four computers from a single keyboard, mouse, and pair of HDMI displays — each running at up to 3840x2160 at 30Hz. If you're managing a multi-system workstation, a broadcast edit suite, a trading desk, or a server-room console environment where two screens are non-negotiable, this is the model to evaluate. It handles both video and USB peripherals in a single switching device, eliminating the cable sprawl of managing separate per-system peripherals. The SV431DHD4KU draws power from a 100–240V AC adapter (12V DC, 1.5A output), so it works on any standard international circuit.

Key Features

• Dual-Monitor 4K Output at 3840x2160@30Hz: Both displays run at full 4K resolution simultaneously — useful on design, engineering, or financial workstations where a second screen carries live data or reference material that needs to be legible at distance, not just present.
• Four Computer Ports via HDMI and USB: Switches among four independent source computers, each connected via HDMI for video and USB for peripherals. That means four fully independent machines share one keyboard, mouse, and monitor pair — reducing desk footprint and the cognitive load of tracking multiple peripherals.
• 5Gbps USB Data Transfer Rate: The integrated USB hub runs at 5Gbps, which matters if any connected peripheral is a USB 3.0 storage device, capture card, or high-speed scanner. You won't throttle a fast peripheral just because it's passing through the KVM.
• 18W Power Consumption: At 18W total draw, the SV431DHD4KU runs well within a standard outlet circuit even in rack-adjacent deployments. The universal 100–240V AC input (0.6A) means no travel adapter or transformer needed across international facilities.
• Compact Desktop Form Factor — 8.7 x 5.1 x 2.5 in, 2.7 lb: Light enough to sit on a desk surface or mount in a shallow rack shelf without dominating the workspace. The physical footprint is modest for a four-port dual-display device.
• Operating Range 0°C to 40°C: Covers standard office and equipment-room environments. Not rated for industrial or outdoor installations — this is a controlled-environment device. Storage temperature extends to -10°C to 60°C, so shipping and warehousing in non-climate-controlled spaces is fine.
• 2-Year Manufacturer Warranty: StarTech provides a 2-year warranty on the SV431DHD4KU, which is consistent with commercial-grade AV switching hardware in this class.

Integration and Compatibility

Each of the four source computers connects via HDMI (video) and USB (peripheral data). The USB interface carries keyboard and mouse signals to the active computer and routes USB hub traffic at up to 5Gbps. The HDMI connections carry video at up to 3840x2160@30Hz — note that this is 30Hz at 4K, not 60Hz. For most productivity and monitoring applications that is not a constraint, but for motion-intensive workflows (video playback, simulation, gaming) you should verify that 30Hz is acceptable on both displays before committing. The device operates at humidity levels from 0% to 80% non-condensing, which covers standard office and data-center environments. No additional software is required for basic switching — port selection is handled at the hardware level.

Frequently Asked Questions

Q: What is the maximum display resolution supported by the SV431DHD4KU?

A: The SV431DHD4KU supports a maximum resolution of 3840x2160 (4K UHD) at 30Hz on both HDMI monitor outputs simultaneously.

Q: How many computers can I connect to the SV431DHD4KU?

A: You can connect up to four computers. Each computer requires one HDMI connection for video and one USB connection for keyboard/mouse and hub traffic.

Q: Does the SV431DHD4KU support 4K at 60Hz?

A: No. The maximum refresh rate at 4K (3840x2160) is 30Hz. If your workflow requires 60Hz at 4K, evaluate a different model rated for that output.

Q: What USB data transfer rate does the SV431DHD4KU support?

A: The integrated USB hub operates at up to 5Gbps, consistent with USB 3.0/USB 3.1 Gen 1 speeds.

Q: What power supply does the SV431DHD4KU require?

A: The unit ships with a power adapter that accepts 100–240V AC input at 0.6A and delivers 12V DC at 1.5A to the switch. Total power consumption is 18W.

Q: What is the warranty on the SV431DHD4KU?

A: StarTech provides a 2-year manufacturer warranty on the SV431DHD4KU.

James Everett

The spec I always flag first on the SV431DHD4KU is the 30Hz ceiling at 3840x2160 — not because it's a flaw, but because it's the single decision point that determines whether this switch belongs in your deployment or not. For four-computer console environments running productivity software, dashboards, or monitoring feeds on dual 4K screens, 30Hz is completely workable. For anyone switching between systems running video editing timelines or high-framerate content, it's a hard limit worth knowing up front.

Technical Highlights:

• Dual 4K HDMI outputs: Both monitors run at full 3840x2160 resolution simultaneously — you're not choosing between 4K on one screen and downscaled output on the other, which is a real differentiator in this port-count class.
• 5Gbps USB hub: Peripheral data moves at full USB 3.0 speed through the switch, so connecting a high-speed USB storage device or capture interface to the active computer won't create a bottleneck at the KVM layer.
• 18W total consumption: At 18W from a 100–240V universal input, this installs cleanly on any international circuit without requiring a dedicated outlet or UPS capacity planning beyond a standard workstation load.

Deployment Considerations:

• Each source computer needs both an available HDMI output and a USB port — plan your cable runs accordingly, particularly in rack-adjacent deployments where rear-panel access varies by server model.
• The 0°C to 40°C operating range means this belongs in a temperature-controlled environment; don't install it in a telecommunications closet that regularly runs above 40°C under load.

The SV431DHD4KU is a practical fit for broadcast production desks, financial trading workstations, and engineering review stations where two 4K screens and four connected systems are the baseline requirement — and where nobody needs 60Hz to do their job.