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Green circuit board with two blue USB 3.0 ports and a 4-pin power connector, M.2 B+M key edge connector visible

SMUGDESK

SMUGDESK 2Port M.2 B+M Key to USB 3.0 1920Pin Adapter with 4Pin Power

SKU CH-XMKP-4XZ2V

Adds two USB 3.0 front-panel ports through an M.2 B+M slot with a 4-pin power connector for stable 5 Gbps transfers

  • Adds two USB 3.0 front-panel headers via M.2 B+M slot
  • 4-pin power connector prevents drop-outs under heavy peripheral load
  • Delivers up to 5 Gbps with USB 3.0 and 2.0 backward compatibility
  • Compact PCB fits standard M.2 B+M dimensions for space-saving installs
  • True plug-and-play — no driver required for instant USB expansion

M.2 B+M Key to USB 3.0 adapter

This SMUGDESK adapter converts a spare M.2 B+M Key slot on a desktop motherboard into two USB 3.0 1920Pin front-panel headers. It targets builders who want extra USB ports without sacrificing a PCIe slot. The card works only with M.2 slots that carry USB signalling; it will not function in NVMe M-key only slots.

4Pin power connector for stable delivery

A dedicated 4Pin power connector supplements the M.2 slot to prevent voltage droop when multiple high-draw peripherals are attached. The board draws no extra power unless the 4Pin header is populated, keeping idle consumption negligible. No active cooling is present, so the PCB runs silently inside the chassis.

Plug-and-play with no driver installation

The adapter requires no driver or software on any supported operating system, enabling immediate use after hardware installation. Backward compatibility with USB 2.0 and 1.1 ensures older devices still connect at their native speeds. The compact PCB fits standard M.2 mounting dimensions for straightforward screw-down installation.

How it compares

Measured against everything we stock in Interface & Card Adapters, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 70% of the 354 comparable items (median $21.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How do I install the SMUGDESK adapter and what step is often missed?

Insert the M.2 B+M Key male connector into a compatible motherboard slot that carries USB signals, secure the board with the mounting screw, then attach the 4‑pin power connector from your PSU to the card — skipping this power step causes unstable device recognition.

What maintenance or replacement will this adapter need over time?

The adapter has no moving parts or firmware, so it requires no scheduled maintenance; replacement is only necessary if the PCB is physically damaged or the motherboard slot fails.

What limit appears first during sustained high‑load transfers?

The USB 3.0 5 Gbps interface caps continuous throughput, so prolonged large‑file copies will hit that bandwidth ceiling before any other constraint.

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