SMUGDESK
SMUGDESK Gen5 MCIO SFF-8654 4i to SFF-8639 U.2 SAS Cable with 15Pin SATA Power 1m
Connects SFF-8654 4i to U.2 NVMe drives with integrated SATA power, delivering 30 Gbps PCIe 5.0 bandwidth over 1 m low-loss copper
- PCIe 5.0 bandwidth up to 30Gbps for NVMe SSD performance
- 15-pin SATA power connector powers U.2 drives without extra cables
- SFF-8654 4i to SFF-8639 U.2 adapter enables high-speed NVMe connection
- 30AWG low-loss copper harness minimises signal attenuation for reliable operation
- 1m length allows flexible routing in rackmount servers and backplanes
Connection and Power Integration
The SMUGDESK Gen5 MCIO cable converts an SFF-8654 4i interface to an SFF-8639 U.2 port while supplying drive power through an integrated 15-pin SATA connector. This single assembly carries both PCIe 5.0 data and power, reducing internal cable count in servers and workstations. It is built for new deployments where U.2 NVMe SSDs connect to modern backplanes or controller cards.
Suitable Builds and Limitations
This harness suits installers who need a 1-metre, 30 Gbps link with combined data and power for U.2 drives in dense chassis. It does not fit systems that require a longer reach or a separate power cable routed to a different PSU connector. Builders using SFF-8654 8i or other wide-port controllers cannot use this 4i version.
Deciding Specification
The cable is rated for 30 Gbps bandwidth, matching PCIe 5.0 signalling across the SFF-8654 4i to SFF-8639 U.2 link. If the target controller or backplane operates at a lower generation, the link will train down, but the 30 Gbps ceiling is the figure that confirms Gen5 readiness.
Highlights
- PCIe 5.0 bandwidth up to 30Gbps for NVMe SSD performance
- 15-pin SATA power connector powers U.2 drives without extra cables
- SFF-8654 4i to SFF-8639 U.2 adapter enables high-speed NVMe connection
- 30AWG low-loss copper harness minimises signal attenuation for reliable operation
- 1m length allows flexible routing in rackmount servers and backplanes
Specifications
No published specifications for this item yet.
Questions about this item
Which connector combination does this cable provide for my NVMe SSD?
It converts an MCIO SFF-8654 4i host port to a U.2 SFF-8639 drive connector and adds a 15-pin SATA power plug so the drive receives both data and power from one harness.
What does the 30 Gbps rating mean when the cable is installed in a server?
The harness is built for PCIe 5.0 signalling, so a Gen5 U.2 NVMe SSD can sustain its full 30 Gbps link speed through the one-metre copper run without a separate power cable.
How does the SFF-8654 4i interface limit performance in practice?
The 4i connector carries four PCIe 5.0 lanes, capping the link at 30 Gbps; the cable’s low-loss 30 AWG copper and shielding preserve that bandwidth across the full metre length.
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