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Blue cable with wide 74-pin connector splitting to two smaller 36-pin ends

Vszerda

Vszerda SFF-8654 8i to Dual SFF-8643 4i Mini SAS HD Cable 50cm

SKU CH-SW2S-VC3KW

Connects a SFF-8654 74-pin backplane to dual SFF-8643 controllers at 24 Gbps per channel over 50 cm

Cable Length 50 cm

  • Connects Slimline SFF-8654 backplanes to dual SFF-8643 controllers
  • 24 Gbps SAS and 8 GT/s PCIe per channel
  • 50 cm length fits compact server chassis
  • 74-pin ultraport connector saves device space
  • Meets SAS 4.0 and PCIe 4.0 specifications

Cable Assembly Purpose

This Vszerda cable assembly connects a backplane or internal device with a Slimline SFF-8654 8i 74pin connector to a controller using dual SFF-8643 Mini SAS HD ports. It is built for servers, data storage systems and workstations that require a direct link between these specific interfaces. The 50cm length suits tight internal routing.

Sustained Signal Behaviour

The assembly meets PCIe Gen3/4 and SAS 4.0 specifications, supporting 24Gbps for SAS and 8GT/s for PCIe per channel across four channels. This allows consistent high-speed data transmission under sustained load without exceeding the rated electrical parameters. The smaller connector form factor saves device space while maintaining the signal integrity required by the standards.

Upgrade Context

It replaces older internal cables that cannot satisfy the SAS 4.0 or PCIe Gen4 signalling rates demanded by modern backplanes and controllers. The jump is worth it when the host system and storage devices both operate at these speeds and the physical connectors match SFF-8654 8i on one side and dual SFF-8643 on the other. Builders needing different pin counts or connector types must select an alternative assembly.

Highlights

  • Connects Slimline SFF-8654 backplanes to dual SFF-8643 controllers
  • 24 Gbps SAS and 8 GT/s PCIe per channel
  • 50 cm length fits compact server chassis
  • 74-pin ultraport connector saves device space
  • Meets SAS 4.0 and PCIe 4.0 specifications

Specifications

No published specifications for this item yet.

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Questions about this item

Does the SFF-8654 8i connector run hot or draw extra power during continuous server use?

The cable itself is passive and generates no heat or power draw; only the connected controller and backplane consume power.

What controller port must my system already have to use the dual SFF-8643 4i ends?

Your RAID or HBA card needs two SFF-8643 Mini SAS HD 4i ports to accept both connectors.

Will this 50 cm cable work with an older SAS 3.0 backplane that uses SFF-8643?

Yes, the cable meets SAS 4.0 and is backward compatible with SAS 3.0 devices using the same SFF-8643 interface.

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