StarTech C2-H46-UC2-PD-KVM 2-Port USB-C KVM Switch with Single 4K Display and 100W Power Delivery

Overview

The StarTech C2-H46-UC2-PD-KVM is a compact, bus-powered 2-port KVM switch designed for professionals who need to drive a single 4K monitor from two USB-C host computers without touching a power brick or swapping cables. It outputs up to 4096x2160 at 60Hz over HDMI 2.1, keeping full 4K resolution intact rather than dropping to 4K/30Hz the way older HDMI 1.4-based switches do. At 7.1 oz and a footprint of 5.5 x 2.8 x 0.6 inches, it sits flat on a desk or tucks behind a monitor without taking up meaningful space. If you're running a dual-workstation setup — a laptop alongside a desktop, or two developer machines sharing one display — this is the switch to evaluate first among KVM switches in this class.

Key Features

• 4096x2160 @ 60Hz via HDMI 2.1: Full 4K DCI resolution at 60 frames per second means motion in video editing previews and UI animations stays smooth. Older HDMI 1.4 switches cap out at 4K/30Hz, which produces visible judder in fast-moving content. The HDMI 2.1 interface here eliminates that problem entirely.
• 100W Power Delivery Pass-Through: The upstream USB-C port accepts up to 100W from a wall adapter and passes it through the switch, so your connected display or dock continues to receive full power regardless of which host is active. This matters if your monitor has a built-in USB hub that powers peripherals — it stays live without a separate adapter.
• 90W Device Charging: The active host computer receives up to 90W of charge through the KVM — enough to run and charge most 13- to 15-inch laptops at full performance. A 10W system overhead is the delta between the 100W input and the 90W delivered to the host, which is standard for this architecture and worth factoring into your power budget.
• Dual USB-C Host Ports: Both host connections are USB-C, so this switch is purpose-built for modern laptop-to-laptop or laptop-to-desktop scenarios where both machines have USB-C or Thunderbolt ports. No adapter dongles needed on either host side.
• Dual USB-A Console Ports: Two USB-A ports on the console side let you connect a keyboard and mouse directly. The 480Mbps USB data rate covers HID peripherals without issue — keyboards and mice transfer orders of magnitude less data than that ceiling demands.
• Bus-Powered Operation: Under normal use the switch draws only 10W and can run from the host USB-C connection itself, eliminating the need for a dedicated wall adapter in low-power configurations. When you need the 90W charging benefit, plug in a USB-C power adapter to the pass-through port.
• VLI VL103R Chipset: The VLI VL103R is a proven USB-C KVM controller chipset with broad OS compatibility across Windows, macOS, and Linux — important if your two hosts run different operating systems, which is common in developer and creative workstation environments.
• 50,000-Hour MTBF: At 50,000 hours of rated mean time between failures, this switch is built for full-time desk use across a multi-year lifecycle, not occasional switching. That translates to roughly 5.7 years of continuous operation before the statistical failure threshold — appropriate for a production workstation tool.
• Operating Temperature Range 5°C to 55°C: Covers standard office and light industrial environments. If you're deploying in a server room or control room that runs hot, verify ambient temperatures stay within this range. Storage down to -20°C means shipping in cold climates won't damage the unit.

Integration and Compatibility

The C2-H46-UC2-PD-KVM connects to any host computer with a USB-C port that supports DisplayPort Alt Mode for video output — standard on most USB-C laptops and desktops produced after 2018. The HDMI 2.1 output pairs with any 4K monitor that accepts HDMI input, which covers the vast majority of current professional displays. The USB-C accessory ecosystem for both hosts remains fully intact since the switch passes data and power simultaneously over a single cable to each machine. The 480Mbps USB data ceiling on the console ports is adequate for keyboard, mouse, and basic USB storage — it is not intended for high-speed peripheral transfers like external SSDs, so plan accordingly if your workflow requires rapid file transfers through the KVM. For teams managing multi-workstation deployments, pair this with a quality monitor arm or mount to centralize the display and minimize desk clutter. Buyers evaluating desktop switching infrastructure may also want to review the broader desktop KVM switch lineup to compare multi-display and multi-port alternatives. If your hosts require Thunderbolt 4 bandwidth passthrough or daisy-chained display support, evaluate a Thunderbolt-native KVM — the C2-H46-UC2-PD-KVM is USB-C DisplayPort Alt Mode, not Thunderbolt, and those are distinct specifications with different bandwidth ceilings.

Frequently Asked Questions

Q: Does the C2-H46-UC2-PD-KVM require a separate power adapter to operate?

A: No. The switch is bus-powered and can operate from the host USB-C connection alone, consuming 10W in normal use. However, to deliver 90W charging to the active host computer, you need to connect a USB-C power adapter (up to 100W) to the power delivery pass-through port. Without the adapter, charging capability is limited to what the host connection provides.

Q: What is the maximum display resolution supported?

A: The C2-H46-UC2-PD-KVM supports up to 4096x2160 (4K DCI) at 60Hz via HDMI 2.1. This is the full DCI 4K specification, higher than standard UHD 3840x2160, and at 60Hz — not the 30Hz cap of older HDMI 1.4 KVM switches.

Q: Can I connect USB-A host computers to this switch?

A: No. Both host ports are USB-C only. The switch is designed specifically for hosts with USB-C ports that support DisplayPort Alt Mode for video. USB-A host connections are not supported without an active adapter, and compatibility through adapters is not guaranteed.

Q: What USB peripherals can I connect to the console USB-A ports?

A: The two USB-A console ports support standard HID devices — keyboard and mouse — at up to 480Mbps (USB 2.0 speed). They are not designed for high-speed data transfer devices like external SSDs or fast USB storage. Stick to input devices and low-bandwidth accessories on these ports.

Q: What is the warranty on the C2-H46-UC2-PD-KVM?

A: StarTech provides a 2-year manufacturer warranty on the C2-H46-UC2-PD-KVM.

Q: Is this switch compatible with macOS and Linux as well as Windows?

A: The VLI VL103R chipset used in this switch has broad OS compatibility. It is designed to work with Windows, macOS, and Linux hosts. Since it presents standard USB HID and DisplayPort Alt Mode interfaces, no proprietary drivers are required on most modern operating systems.

Ted Perry

The C2-H46-UC2-PD-KVM earns a spot on my recommended list specifically because of the 100W power delivery pass-through paired with 90W host charging — most KVM switches in this size class either skip PD entirely or throttle it to 60W, which isn't enough to sustain a 15-inch laptop under load. The 10W system overhead is expected and clearly documented, so there are no surprises when you budget your power chain.

Technical Highlights:

• HDMI 2.1 at 4096x2160/60Hz: This is the specification that separates this unit from budget alternatives. DCI 4K at 60Hz is meaningful for video editing and color-critical workflows where 4K/30Hz produces visible judder — you're getting the full frame rate, not a compromise.
• 90W Device Charging: Sustained 90W delivery to the active host means most professional laptops — including power-hungry 14-inch models — charge at full rate while in use, not just in sleep. No separate charger needed at the desk.
• 50,000-Hour MTBF: At 50,000 hours rated life, this is not a consumer-grade device. For a shared workstation environment running two shifts, that's well over a decade of expected service life under continuous use.

Deployment Considerations:

• Confirm both host machines support USB-C DisplayPort Alt Mode — Thunderbolt 3/4 ports typically do, but USB-C ports on budget laptops sometimes omit video output. Check the host spec sheet before ordering, not after.
• The 480Mbps USB console limit is a real constraint if anyone in your workflow expects to transfer large files through the KVM. Route high-speed peripherals directly to the host machines and use the KVM console ports exclusively for keyboard and mouse.

This switch is the right call for a two-machine creative or developer workstation where both hosts are modern USB-C laptops sharing a single 4K display — particularly in compact desk setups where a full desktop KVM with separate power bricks would create cable management problems.