StarTech SV1631DUSBU 16-Port USB KVM Switch

Overview

The StarTech SV1631DUSBU is a 16-port USB KVM switch that puts a single keyboard, mouse, and VGA monitor in control of up to 16 directly connected computers — and up to 136 machines when cascaded with compatible units. Built for IT rooms, server closets, and multi-system workstations where desk space and operational overhead are both at a premium, the SV1631DUSBU handles switching via push button, hotkey sequences, or an on-screen display so operators can reach any connected host without touching a cable. If you're managing a dense rack of USB servers or lab workstations from a single console, this is the architecture that eliminates KVM sprawl without requiring proprietary peripherals.

Key Features

• 16 VGA Host Ports: Connect up to 16 computers through dedicated VGA ports — each host handled independently so a crash on one machine doesn't affect access to others. No port-sharing, no contention.
• Cascade to 136 Computers: Chain compatible KVM units downstream to manage up to 136 computers from this single console. For growing server environments, that means you're not replacing the switch when you add a rack — you're extending it.
• 1920×1440 @ 60 Hz Maximum Resolution: Exceeds standard 1080p, so if your console monitor runs at a high-res 4:3 native resolution, you get pixel-accurate output without downscaling. Useful on engineering workstations where display fidelity matters during remote operation.
• Three Switching Methods — Push Button, Hotkeys, OSD: Push-button switching works when your hands are already at the rack. Hotkey sequences let you switch without leaving the keyboard mid-task. The OSD gives you a named list of connected hosts so you can navigate by system name rather than port number — critical in 16-port environments where memorizing port assignments is unrealistic.
• USB Console Interface (2× USB 2.0 Type-A): The console side accepts standard USB keyboards and mice without drivers or custom firmware on the connected computers. That simplifies OS compatibility and means you're not locked to specific peripheral vendors.
• 18W Power Consumption, Universal AC Input: Draws only 18W at full load from any 100–240V AC supply. The internal adapter outputs 12V DC at 1.5A, so you won't need a dedicated high-amp circuit — standard rack PDU outlets are fine. The universal voltage range means deployment in international facilities without a step-down transformer.
• 1U Form Factor (21.3″ × 7.1″ × 1.8″): At 1.8 inches tall, the SV1631DUSBU occupies a single rack unit. At 6.8 lb it's light enough for a single-person rack install. The 21.3-inch width fits standard 19-inch rack shelves with a rackmount kit.
• Operating Temperature 5°C to 40°C: Rated for typical controlled server room and office environments. If your installation is in an unconditioned space that gets above 40°C in summer, plan for adequate cooling — this unit is not rated for harsh industrial thermal ranges.

Integration and Compatibility

The SV1631DUSBU presents a standard USB HID interface to connected hosts, which means it works across Windows, Linux, and macOS systems without installing KVM-specific drivers. The VGA host connectors are the compatibility constraint to plan around: hosts must expose a VGA output, or you'll need active display adapters for machines with DisplayPort or HDMI-only outputs. On the console side, any USB keyboard and USB mouse connect directly to the two Type-A ports — no proprietary dongle required. When cascading, confirm that downstream units in your chain support the same cascade protocol to reach the full 136-computer maximum. For KVM switches in larger deployments, the cascade architecture reduces total hardware cost versus buying a single high-density unit. Pair with a quality rack management solution and a rackmount shelf or bracket if a full rack-mount kit is required for your enclosure. For teams evaluating USB versus PS/2 console options, review the KVM switch buying guide for a side-by-side comparison of interface tradeoffs. The StarTech KVM and connectivity line includes both desktop and rack-mount configurations across various port counts if this model's 16-port capacity doesn't match your current count.

Frequently Asked Questions

Q: How many computers can the SV1631DUSBU control in a cascaded configuration?

A: Up to 136 computers when cascaded with compatible KVM units. Directly, it supports 16 computers from a single console.

Q: What display resolution does the SV1631DUSBU support?

A: The maximum analog resolution is 1920×1440 at 60 Hz over VGA. This exceeds standard 1080p and supports high-resolution 4:3 monitors used in engineering and server environments.

Q: Does the SV1631DUSBU require any drivers to work with connected computers?

A: No. It uses a standard USB HID interface on the console side, which is natively recognized by Windows, Linux, and macOS without additional driver installation.

Q: What switching methods does the SV1631DUSBU support?

A: Three methods: front-panel push buttons for direct port selection, keyboard hotkey sequences for hands-free switching, and an on-screen display (OSD) that lists connected hosts by name for easy navigation in a 16-port environment.

Q: What is the warranty on the SV1631DUSBU?

A: The SV1631DUSBU carries a 3-year manufacturer warranty.

Q: What are the power requirements for the SV1631DUSBU?

A: It accepts 100–240V AC input at 0.6A and consumes 18W at full load. The internal supply outputs 12V DC at 1.5A — compatible with standard rack PDU outlets worldwide.

Jerry Tildsen

The spec I keep coming back to on the SV1631DUSBU is the cascade ceiling of 136 computers. Most buyers purchase this as a straight 16-port switch and never cascade it — but in a growing server room, knowing you can extend to 136 machines without replacing the head unit changes how you spec the initial deployment. Buy once, expand later without a forklift upgrade.

Technical Highlights:

• Cascade Architecture: 136-computer maximum across a cascaded chain — meaningful for facilities that expect to add racks over a 2–3 year horizon without buying a new primary KVM unit.
• 1920×1440 VGA Output: Higher than the 1920×1080 ceiling on many competing units in this port-count range. If your console display is a high-res 4:3 panel, you keep full native resolution without scaling artifacts.
• 18W Full-Load Draw: At 0.6A on a 100–240V universal input, power budget impact is minimal — a standard 15A rack PDU circuit can comfortably run multiple units simultaneously without tripping breakers.

Deployment Considerations:

• All 16 host connections are VGA — if even one target server has moved to DisplayPort-only output, budget for active adapters before the installation day. Discovering this at rack time costs more than the adapters.
• The 5°C to 40°C operating range is a hard ceiling. An unconditioned equipment room that regularly exceeds 40°C in summer will shorten the unit's service life — verify ambient temps before permanent installation.

The SV1631DUSBU is the right fit for a medium-density server room or IT lab where the console operator needs named-host OSD navigation across 16 machines, and where the facility may grow to a second or third rack over the next few years — the cascade headroom makes it a rational anchor unit for that kind of phased expansion.