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Green PCIe adapter card with silver U.2 connector and gold edge fingers

SMUGDESK

SMUGDESK PCIe 3.0 x4 to U.2 SFF-8643 NVMe Adapter Card 32Gbps 2.5" SFF-8639 U.2 SSD

SKU CH-RRSS-Y2QSK

Adds a U.2 SFF-8643 port for 2.5" SFF-8639 NVMe SSDs via PCIe 3.0 x4 at 32Gbps

  • 32 Gbps bandwidth enables rapid data transfer
  • PCIe 3.0 x4 converts to U.2 SFF-8643 for 2.5" SFF-8639 NVMe SSD
  • Compatible with 750 series and other mainstream U.2 drives
  • Stable signal output suits long-term server and workstation use
  • Simple installation allows internal storage expansion

PCIe 3.0 x4 to U.2 Adapter

This SMUGDESK adapter card converts a PCIe 3.0 x4 slot into a U.2 SFF-8643 port. It enables the use of 2.5-inch SFF-8639 NVMe SSDs in systems that lack a native U.2 connector. The card targets server and workstation builders who need to add high-speed enterprise storage without replacing the motherboard.

Build Integration and Slot Requirements

Installation requires a free PCIe 3.0 x4 slot and physical space for a 2.5-inch U.2 drive. The adapter frees the system from relying on M.2 slots or proprietary drive bays. It provides a direct pathway for U.2 SSDs, simplifying internal storage expansion in compatible chassis.

Bandwidth Headroom and Drive Support

The card delivers up to 32Gbps bandwidth, matching the full throughput of a PCIe 3.0 x4 link. It fully supports 750 series and other mainstream U.2 NVMe drives. Performance will be limited by the PCIe 3.0 interface, so drives requiring PCIe 4.0 or 5.0 speeds cannot reach their maximum potential.

How it compares

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

Price $24.99
Pricier than about 55% 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

Does the PCIe 3.0 x4 link saturate before the U.2 drive reaches its peak throughput?

The adapter provides 32Gbps bandwidth over PCIe 3.0 x4, matching the U.2 interface speed so the link does not become the bottleneck under sustained load.

How much heat does the card generate during continuous all-day operation?

The card has no active cooling and relies on case airflow; its simple PCB design keeps power draw low enough for stable server and workstation use without added noise.

Which specific NVMe SSD must I already own for this adapter to work?

You need a 2.5-inch SFF-8639 U.2 NVMe SSD such as the 750 series; the adapter converts the PCIe 3.0 x4 slot to the SFF-8643 connector required by those drives.

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