Supermicro - CBL-SAST-1237LP-100 Slimline x8 (LE) to 2x SlimlineLP x4 (STR)

12 Gbps per lane across eight lanes, split into two four-lane paths—this Supermicro breakout cable turns a single SlimSAS 8i port into dual SlimSAS 4i connections without signal compromise. Built for dense server and storage environments where every millimeter counts.

Overview

The Supermicro CBL-SAST-1237LP-100 is an internal SAS breakout cable engineered for high-performance data transfer in servers, workstations, and storage systems. It connects a SlimSAS 8i (SFF-8654 8i) host or controller port to two SlimSAS 4i (SFF-8654 4i) backplane or device ports. The left-exit orientation on the 8i connector and straight orientation on the 4i connectors ensure a clean, space-efficient routing inside cramped chassis. With a length of 1 meter, it offers flexibility for various internal layouts while maintaining signal integrity.

What stands out

• Supports up to 12 Gbps per lane for SAS 3.0 speeds, delivering a total of 96 Gbps aggregate bandwidth across the 8-lane interface.
• Left-exit SlimSAS 8i connector reduces cable strain and improves airflow in tight server cases.
• Low-profile SlimSAS 4i connectors fit modern backplanes and drive cages without clearance issues.
• RoHS compliant construction meets environmental standards for global deployment.
• Breakout design allows one 8i port to serve two 4i targets, maximizing controller port utilization.

Technical details

• Connector A: SlimSAS 8i (SFF-8654 8i) with left exit orientation
• Connector B: 2x SlimSAS 4i (SFF-8654 4i) with straight orientation
• Cable length: 100 cm (1 meter)
• Data protocol: SAS (Serial Attached SCSI)
• Data transfer rate: up to 12 Gbps per lane
• Lane configuration: 8 lanes to 2x 4 lanes
• Application: server, workstation, storage system
• Compatibility: Supermicro motherboards, RAID controllers, HBA cards with SlimSAS 8i ports
• Form factor: SlimSAS
• Product series: CBL-SAST
• RoHS compliance: Yes

Our verdict

A reliable, high-bandwidth internal cabling solution for Supermicro systems. The left-exit design is a thoughtful touch for cable management, and the 1-meter length covers most mid-tower and rackmount configurations. If you need to split an 8i port into two 4i connections without sacrificing speed, this cable delivers.