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SlimSAS SFF-8654 cable splitting to two SFF-8639 U.2 NVMe connectors, 80cm length

SMUGDESK

SMUGDESK SFF8654 8i to Dual SFF8639 NVMe (U.2) Cable, 80cm

SKU CH-9YKP-W68RS

Connects a single SFF8654 8i SlimSAS port to dual SFF8639 U.2 NVMe drives with integrated power and data over 80cm for dense server and NAS builds

  • Single SFF-8654 8i port expands to dual SFF-8639 U.2 NVMe drives for multi-SSD growth
  • Integrated power and data delivery supports NVMe, SAS and SATA solid-state drives in one cable
  • 80cm length enables clean internal routing inside high-density server, NAS and storage backplanes
  • Low-loss wire construction maintains stable high-speed bandwidth for enterprise storage performance
  • SlimSAS compact form factor saves chassis space for low-profile and dense server builds

SFF8654 8i to Dual U.2 NVMe Cable

This cable adapts a single SFF8654 8i SlimSAS port into two SFF8639 U.2 connectors. It enables multiSSD expansion for servers, NAS units and storage backplanes. The integrated design carries both data and power for NVMe, SAS and SATA solidstate drives. Builders adding U.2 storage to a SlimSAS controller use this for dense configurations.

Bandwidth Limits of the SlimSAS 8i Interface

The SFF8654 8i link provides eight highspeed lanes shared between the two U.2 ports. Total throughput cannot exceed the controller's PCIe generation and lane allocation. Each attached NVMe SSD negotiates its own link width up to the available lanes. Simultaneous heavy loads on both drives will contend for the shared upstream bandwidth.

Installation Notes and Common Issues

The 80cm length suits standard server chassis routing; measure the path from controller to backplane before fitting. Ensure the SlimSAS latch seats fully to avoid intermittent detection. The cable supplies drive power through the SFF8639 connector, so no separate power lead is required. Verify the controller BIOS or operating system recognises both ports after connection.

Highlights

  • Single SFF-8654 8i port expands to dual SFF-8639 U.2 NVMe drives for multi-SSD growth
  • Integrated power and data delivery supports NVMe, SAS and SATA solid-state drives in one cable
  • 80cm length enables clean internal routing inside high-density server, NAS and storage backplanes
  • Low-loss wire construction maintains stable high-speed bandwidth for enterprise storage performance
  • SlimSAS compact form factor saves chassis space for low-profile and dense server builds

Specifications

No published specifications for this item yet.

Questions about this item

Should I choose the 80cm length or a different size for my server chassis?

The 80cm length is the only size offered for this SFF8654 8i to dual SFF8639 cable, designed for neat routing in dense server and NAS builds.

What bandwidth will I actually get when connecting NVMe SSDs through this cable?

It carries the full PCIe lane bandwidth from the SFF8654 8i controller to each SFF8639 U.2 NVMe SSD, limited only by the drive and controller specs.

Does the SFF8654 8i interface cap performance compared to other SlimSAS connectors?

The SFF8654 8i connector provides eight lanes supporting SAS, SATA and NVMe protocols, with no bandwidth reduction from the cable itself.

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