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Green PCB adapter card with SFF-8639 U.2 connector and M.2 M-key slot plus SFF-8643 Mini SAS cable

Syba

Syba SI-ADA40121 U.2 SFF-8639 to M.2 M-Key NVMe expansion card

SKU CH-S3NJ-MVK8D MPN SI-ADA40121

Adapts a 2.5-inch U.2 NVMe SSD to an M.2 M-key slot via Mini SAS cable at 12 Gbps

  • Supported operating systemsWindows OS
  • Product typeU.2 (SFF-8639) to M.2 M-Key NVMe
  • DetailsIOCrest SI-ADA40121 provides the capability to utilize an In
  • Key featuresConverts M.2 M-Key NVMe SSD connection to SFF-8643 Mini SAS
  • Product weight0.4 lb (0.18 kg)
  • In the box1 x U.2 to M.2 adapter 1 x SFF-8639 NVMe to SFF-8643 Mini SA
  • Add 2.5" U.2 NVMe storage via M.2 M-Key slot
  • PCIe 3.0 x4 delivers 12 Gbps bandwidth
  • Driver-free operation on modern Windows OS
  • Includes SFF-8639 to SFF-8643 Mini SAS cable
  • Lightweight .40 lb adapter with simple installation

U.2 SFF-8639 to M.2 M-Key adapter

The Syba SI-ADA40121 converts an M.2 M-Key NVMe slot into a U.2 SFF-8639 connection for 2.5-inch drives. It targets builders adding enterprise or Intel 750 Series SSDs to a consumer motherboard. The card delivers PCIe 3.0 x4 bandwidth up to 12 Gbps without needing extra drivers on current Windows releases.

Compatibility check before ordering

Confirm the motherboard has an M.2 M-Key slot wired for NVMe and running at PCIe 3.0 x4. The adapter occupies that slot and routes the signal through an included SFF-8643 Mini SAS cable to the U.2 drive. Verify the operating system is a recent Windows version for driver-less operation.

What the bundled cable and manual enable

A SFF-8639 NVMe to SFF-8643 Mini SAS cable ships in the box, providing the physical link between the adapter and the 2.5-inch U.2 SSD. The user manual walks through the installation steps so the drive appears to the system as a standard NVMe device. No additional software or power adapters are required.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $48.99
Pricier than about 70% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameSYBA
Model nameSI-ADA40121
Product typeU.2 (SFF-8639) to M.2 M-Key NVMe
Size & build
Product weight0.4 lb (0.18 kg)
Shipping weight0.13 kg
Package size175 × 141 × 39 mm
Compatibility
Supported operating systemsWindows OS
In the box
In the box1 x U.2 to M.2 adapter
1 x SFF-8639 NVMe to SFF-8643 Mini SAS cable
1 x User Manual

Questions about this item

What comes in the box and do I need to buy any cables separately?

The package includes the U.2 to M.2 adapter, a SFF-8639 NVMe to SFF-8643 Mini SAS cable, and a user manual. No additional cables are required for the listed connections.

Which NVMe SSD models are supported by this adapter?

The specifications highlight compatibility with the Intel 750 Series 2.5" NVMe SSD using the SFF-8639 interface. Other M-key NVMe drives may work but are not explicitly listed.

What does the 12 Gbps bandwidth figure mean for actual drive performance?

The adapter provides PCIe 3.0 x4 bandwidth capability of 12 Gbps through the M.2 M-key slot. Real-world throughput depends on the specific NVMe SSD and host system configuration.

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