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Green circuit board with gold PCIe edge connector and silver SFF-8639 port for 2.5 inch NVMe SSD

SMUGDESK

SMUGDESK PCIe 4X to U.2 NVMe Adapter Card SFF-8639 2.5

SKU CH-HQMC-QX200

Converts a PCIe 4X slot to an SFF-8639 U.2 interface for 2.5 NVMe SSDs

  • Converts a PCIe 4X slot into an SFF-8639 U.2 connection
  • Designed specifically for 2.5 inch U.2 NVMe solid state drives
  • Delivers stable high-speed data transmission for efficient performance
  • Broad compatibility with mainstream motherboards and devices
  • Plug and play installation simplifies storage expansion

PCIe 4X to U.2 NVMe Adapter

This SMUGDESK adapter converts a PCIe 4X slot into an SFF-8639 U.2 interface for 2.5 inch NVMe solid state drives. It provides a direct high-speed connection without active components. The card is designed for storage expansion in desktop or server environments.

Builders adding U.2 NVMe drives

Suits users with a free PCIe 4X slot who want to install a 2.5 inch U.2 NVMe drive. Not suited for systems lacking a PCIe 4X slot or for drives using different physical connectors or protocols. Buyers needing hot-swap bays or RAID controllers should look at dedicated solutions.

SFF-8639 U.2 interface

The adapter presents a single SFF-8639 connector wired to the PCIe 4X host link. This specific interface determines whether your 2.5 inch NVMe drive will attach and operate correctly. Verify that your SSD uses the U.2 form factor before purchasing.

How it compares

Measured against everything we stock in SATA, IDE & M.2 Drive Adapters, at today’s prices. Recalculated every night.

Price $29.99
Pricier than about 65% of the 1,721 comparable items (median $22.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How does the PCIe 4X connection translate to real-world speed for my U.2 NVMe SSD?

The adapter carries the drive's native NVMe protocol over a PCIe 4X electrical link, so the SSD runs at its rated throughput without conversion overhead.

What does the SFF-8639 interface actually limit in daily use?

SFF-8639 is the physical U.2 connector standard; it passes up to four PCIe lanes, so the practical ceiling is the lane count and the SSD's own controller, not the connector itself.

What physical space and mounting does the card need inside my case?

It occupies a standard PCIe expansion slot and holds a 2.5-inch U.2 drive; secure the drive to the card and the bracket to the chassis for a solid mount.

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