Supermicro Cable CBL-MCIO-1235M5FY MCIO x8 STR a 2x x4 35cm - Cable

Modern high-density servers and storage systems often face a critical challenge: how to efficiently route PCIe lanes to multiple drives or accelerators without sacrificing signal integrity or consuming excessive space. The Supermicro CBL-MCIO-1235M5FY solves this by splitting a single MCIO x8 connection into two MCIO x4 connections, enabling flexible, high-speed internal connectivity in compact form factors.

Who is it for

This cable is built for system integrators, data center technicians, and IT professionals deploying Supermicro servers, storage arrays, or any MCIO-enabled hardware. It is ideal for those who need to connect a host controller to multiple NVMe drives, GPU accelerators, or other PCIe endpoints while maintaining clean cable management and reliable performance.

Main features

• Converts one MCIO x8 port into two MCIO x4 ports, maximizing lane utilization.
• Supports PCIe Gen4 and Gen5 signaling for up to 32 GT/s per lane.
• Straight connector orientation on all ends for easy insertion in tight spaces.
• 35 cm length offers flexibility without excess slack.
• High-quality copper conductors and robust MCIO connectors ensure signal integrity.
• Compatible with Supermicro motherboards, backplanes, and other MCIO-based systems.

Specifications

• Brand: Supermicro
• Model: CBL-MCIO-1235M5FY
• MPN: CBL-MCIO-1235M5FY
• Cable Type: MCIO (Mini-Cool Edge IO) data cable
• Connector 1: MCIO x8, straight
• Connector 2: MCIO x4, straight
• Connector 3: MCIO x4, straight
• Cable Length: 35 cm
• Data Transfer Rate: PCIe Gen4 / Gen5 compatible (up to 32 GT/s per lane)
• Application: Internal server/storage connectivity
• Function: Splits one MCIO x8 into two MCIO x4
• Compatibility: Supermicro servers/motherboards and other MCIO-enabled systems
• Product Sub-Type: Data Cable
• Connector Material: High-density plastic with metal contacts
• Cable Material: Copper

Tips

Before installation, verify that your host controller and target devices support the same PCIe generation to achieve optimal performance. Route the cable away from high-EMI components such as power supplies and fans to minimize interference. For dense chassis, consider using cable management arms or clips to maintain airflow.