CBL-MCIO-1255S4Y Supermicro 55cm Cable

High-Performance internal storage and PCIe breakout cabling with the CBL-MCIO-1255S4Y

The CBL-MCIO-1255S4Y is a Supermicro MCIO-to-SlimSAS internal interconnect cable assembly designed to map an MCIO x8 host interface into dual SlimSAS x4 device links for dense NVMe/SAS/SATA architectures. In modern 1U/2U platforms where CPU PCIe lanes are routed through MCIO headers, the CBL-MCIO-1255S4Y enables clean lane breakout to backplanes, HBAs, RAID adapters, or NVMe switch fabrics without compromising serviceability.

By preserving an 8-lane path and splitting it into 2 independent x4 links, the CBL-MCIO-1255S4Y supports balanced storage fan-out and predictable PCIe Gen-ready signal routing within the chassis. The 55 cm length aligns with common front-back cable management zones, helping maintain airflow and minimizing strain on connectors during maintenance cycles. This makes the CBL-MCIO-1255S4Y a practical choice for systems engineered around high-core-count CPU platforms, high-density NVMe bays, and modular backplane designs where internal I/O harnessing must remain deterministic.

Why Choose the CBL-MCIO-1255S4Y?

The CBL-MCIO-1255S4Y provides a straightforward, standards-aligned method to scale internal storage connectivity while keeping lane allocation transparent to the platform design. It supports high density-to-performance builds by enabling dual x4 device-side connections from a single MCIO x8 host point, reducing cabling complexity and simplifying field replacement in enterprise deployments.

Supermicro designs interconnect components to match server mechanical constraints and data centre operational requirements, prioritising consistent fitment, repeatable routing, and reliability across validated platform ecosystems. This approach supports predictable integration with current rack server architectures and disciplined lifecycle maintenance.

Key Applications:

• NVMe backplane interconnect
• SAS/SATA backplane cabling
• HBA and RAID controller connectivity
• NVMe switch internal uplinks
• Data centre spare cable kits

At Happyware - Server Hardware you benefit from non-binding offers tailored to your configuration and bulk order discount options for standardised rollouts, enabling efficient procurement of the CBL-MCIO-1255S4Y for new builds and spares strategies.