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Black SlimSAS SFF-8654 8i cable splitting to two U.2 SFF-8639 connectors with 15-pin SATA power

Vszerda

Vszerda SlimSAS SFF-8654 8i to Dual U.2 SFF-8639 Adapter Cable with 15Pin SATA Power, 0.5m

SKU CH-THNZ-QJ1XG

Connects a SlimSAS 8i host to two U.2 NVMe SSDs with 15-pin SATA power, using silver-plated AWG30 Twinax for PCIe 4.0 x8 bandwidth up to 64Gbps

  • Connector count26
  • Connector detailsSlimsas 4i to U.2 Sff-8639 With 15pin Sata Power
  • Connector genderMale-to-Male
  • Cable shieldingHigh Speed
  • Product typeSilver-plated AWG30 Twinax Cable
  • Product colorBlack
  • Connects one SlimSAS 8654 8i host to two U.2 8639 NVMe SSDs at PCIe 4.0 x8 speed
  • 15-pin SATA power feeds both drives directly from the cable
  • 85-ohm AWG30 silver-plated Twinax keeps signal loss low for PCIe 4.0 reliability
  • 5 m length fits tight server and workstation chassis
  • Works with PCIe 4.0 and 3.0 motherboards without bifurcation

SlimSAS SFF-8654 8i adapter for dual U.2 NVMe

This cable connects a single SFF-8654 8i SlimSAS host port to two U.2 SFF-8639 NVMe solid-state drives. It delivers PCIe 4.0 x8 bandwidth with a total throughput of up to 64Gbps. The 0.5m silver-plated AWG30 Twinax construction uses 85 impedance matching for signal integrity. It suits rack servers, NAS appliances and high-performance computing clusters that need dense NVMe storage expansion.

Verify host connector and bifurcation support

Confirm that your motherboard or backplane provides a genuine SFF-8654 8i SlimSAS interface before ordering. The link operates at PCIe 4.0 or 3.0 speeds but requires a non-bifurcation host port to address both U.2 drives simultaneously. Ensure the physical slot and firmware can expose two independent NVMe namespaces through that single 8i connection. No external PCIe power cables are needed because the adapter includes a 15-pin SATA power input.

15-pin SATA power enables standalone SSD operation

The bundled 15-pin SATA power connector supplies the drives directly from the system power supply, removing the requirement for separate PCIe power cables. This simplifies cabling in dense chassis where auxiliary power headers are scarce. Compatibility is listed for U.2 NVMe models such as Intel Optane, Samsung PM1735 and Micron 9300 series drives. The cable carries 26 conductors in a black jacket.

How it compares

Measured against everything we stock in SAS, SCSI, InfiniBand & MCIO Cables, at today’s prices. Recalculated every night.

Price $22.99
Cheaper than about 60% of the 1,224 comparable items (median $26.99).

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Specifications

Product
Brand name10Gtek
Product typeSilver-plated AWG30 Twinax Cable
Product colorBlack
Ports & slots
Connector count26
Connector detailsSlimsas 4i to U.2 Sff-8639 With 15pin Sata Power
Connector genderMale-to-Male
Size & build
Cable shieldingHigh Speed

Questions about this item

What comes in the box and what else is needed?

The cable includes the SlimSAS SFF-8654 8i plug, two U.2 SFF-8639 connectors and a 15-pin SATA power lead. A PCIe 4.0 x8 host slot and two U.2 NVMe SSDs must be supplied separately.

Which version suits a dual U.2 NVMe upgrade?

This single 0.5m cable splits one SFF-8654 8i port into two U.2 SFF-8639 bays, so choose it when adding a pair of drives such as Samsung PM1735 or Micron 9300 to a server or workstation.

What does the 64Gbps figure mean once installed?

It is the combined PCIe 4.0 x8 bandwidth shared between both SSDs, giving each drive up to full x4 speed when the host supports bifurcation.

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