Supermicro CBL-MCIO-1255L4Y Cable MCIO x8 a 2 SlimSAS LP x4, recto, 55cm

For dense server and storage builds where a single host connector must feed two high-speed devices, the Supermicro CBL-MCIO-1255L4Y delivers an elegant split: one MCIO x8 on the controller side fans out to two SlimSAS LP x4 receptacles. This 55 cm straight cable eliminates the need for multiple discrete runs, reducing clutter while preserving signal integrity for PCIe Gen5 and SAS 4.0 workloads.

Highlights

• Host connector: MCIO x8 (miniature card-edge I/O) with 8 total lanes
• Device connectors: 2 × SlimSAS LP x4, straight orientation
• 55 cm length – ideal for internal routing between motherboard/RAID/HBA and backplanes or drives
• Supports PCIe and SAS protocols, ready for Gen5 speeds
• Low-profile SlimSAS LP connectors fit tight 1U/2U chassis
• Supermicro CBL-MCIO series – engineered for Supermicro servers and storage systems

In daily use

Install this cable when you need to connect a single MCIO x8 port to two separate x4 devices – for example, a pair of NVMe SSDs or SAS/SATA drives on a backplane. The 55 cm length gives enough slack for clean cable management without excess loops, and the straight SlimSAS LP connectors make insertion and removal straightforward even in cramped enclosures. Because it carries eight lanes total, you maintain full bandwidth to each device when both are active.

Full specifications

• Brand: Supermicro
• Model: CBL-MCIO-1255L4Y
• MPN: CBL-MCIO-1255L4Y
• Cable type: Internal server/storage cable
• Connector A: MCIO x8 (host side)
• Connector B: 2 × SlimSAS LP x4 (device side)
• Connector B orientation: Straight (STR)
• Length: 55 cm
• Data lanes: 8 (x8)
• Supported protocols: PCIe, SAS
• Max data transfer rate: PCIe Gen5 / SAS 4.0
• Application: Internal server/storage connectivity
• Compatibility: Supermicro servers and storage systems

Final note

When you need a reliable, high-density split from MCIO to dual SlimSAS LP, this Supermicro cable keeps your build tidy and your data moving at full speed.