Supermicro CBL-SAST-1262-100 Slimline x8 to 2x MiniSAS HD x4

Eight lanes of 12 Gbps SAS 3.0 bandwidth travel through a single slimline connector in this Supermicro internal breakout cable, then fan out to two independent Mini-SAS HD x4 ports. That is 96 Gbps of aggregate throughput across a one-meter run, ready for dense storage shelves and high-performance RAID configurations.

Overview

The CBL-SAST-1262-100 is a purpose-built internal SAS data cable engineered for Supermicro servers, workstations, and storage systems. It converts one SFF-8654 Slimline x8 host connection into two SFF-8643 Mini-SAS HD x4 device connections, enabling clean, high-density wiring without sacrificing signal integrity. The 100 cm length provides enough reach for mid-tower and rackmount chassis routing while keeping latency and attenuation to a minimum.

What stands out

• Breakout design: one Slimline x8 to two Mini-SAS HD x4, ideal for connecting a single controller to dual drive backplanes or multiple NVMe/SAS devices.
• Full SAS 3.0 compliance with up to 12 Gbps per lane, backward compatible with 6 Gbps and 3 Gbps SAS generations.
• Copper conductors and PVC jacket ensure reliable signal transmission and durability in internal chassis environments.
• Male-to-male connectors with secure latching mechanisms prevent accidental disconnects in vibration-prone server racks.
• RoHS compliant construction meets global environmental standards.

Technical details

• Connector 1 (Host): Slimline SAS (SFF-8654), x8 configuration
• Connector 2 (Device): 2x Mini-SAS HD (SFF-8643), each x4 configuration
• Cable length: 100 cm (1 meter)
• Data transfer rate: up to 12 Gbps per lane (SAS 3.0)
• Supported protocols: SAS (Serial Attached SCSI)
• Application: internal
• Total lanes: 8
• Conductor material: copper
• Jacket material: PVC
• Colour: black
• RoHS compliant: yes

Our verdict

A no-compromise internal SAS breakout cable for Supermicro builds that demand high lane counts and clean cable management. The Slimline x8 to dual Mini-SAS HD x4 configuration is a proven workhorse in enterprise storage, and the 1 m length hits the sweet spot for most chassis layouts.