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EXLink MB408A4

SlimSAS 4i (SFF-8654) to PCIe 4.0 x4 Adapter Card with Redriver
Product Details
  • Bring PCIe Gen4 NVMe Connectivity to SlimSAS-Based Storage
    The EXLink MB408A4 adapter card is designed to bridge standard PCIe (x4) slots with SlimSAS 4i (SFF-8654) connectivity, enabling high-speed PCIe Gen4 NVMe signal transmission for advanced storage applications.

    By integrating a PCIe Gen4 redriver and comprehensive signal buffering, the MB408A4 allows system designers and integrators to deploy SlimSAS-based NVMe solutions with greater flexibility, even in platforms requiring longer trace lengths or cable connections.
  • Optimized PCIe Gen4 x4 Connectivity for NVMe Storage
    With a PCIe Gen4 x4 interface delivering up to 64Gbps of total bandwidth, the EXLink MB408A4 enables high-performance NVMe connectivity through SlimSAS 4i (SFF-8654) cabling.

    This adapter provides a practical solution for platforms adopting PCIe Gen4 architectures, allowing system builders to extend PCIe signals beyond standard motherboard trace limits while maintaining reliable NVMe performance in server and workstation environments.
  • Maintain Stable High-Speed Signals with Integrated Redriver
    As PCIe Gen4 data rates reach 16 GT/s, signal integrity becomes increasingly important - especially when using longer PCB traces or external cables. The MB408A4 integrates a PCIe Gen4 redriver to equalize and restore signals, helping sustain stable 16 GT/s transmission across four PCIe lanes.

    This design enables SlimSAS-based NVMe connections to maintain full PCIe Gen4 performance, even in complex system layouts where direct connections are not feasible.
  • PCIe Clock Buffer & Sideband Signal Management
    To maintain accurate timing across connected devices, the MB408A4 features a built-in 100MHz PCIe clock buffer, supporting stable synchronization over extended routing paths.

    In addition, buffered PERST#, WAKE#, CLKREQ#, SMBCLK, and SMBDAT signals enhance system stability and management capability, making the adapter suitable for enterprise-grade platforms and continuous-operation environments.
  • Flexible Platform Compatibility
    The MB408A4 is compatible with a wide range of PCIe host environments. It supports PCIe Gen2 through Gen5 slots and can be installed in x4 physical PCIe slots on motherboards.

    With no operating system limitations, the adapter is well suited for system integrators, OEMs, and solution providers building NVMe-enabled platforms across different hardware and software environments.
  • Ideal Applications

    The EXLink MB408A4 is well suited for:

    • PCIe Gen4 NVMe storage expansion
    • SlimSAS-based storage architectures
    • Server and workstation platforms requiring extended PCIe routing
    • System validation, testing, and development of PCIe Gen4 solutions
  • Simplify NVMe Upgrades with the ICY DOCK Selection Tool
    NVMe Storage Selection Tool - an interactive guide that helps you find compatible mobile racks, cables, and adapters based on your system's NVMe slot type and installation needs.

    Perfect for system integrators and DIY users alike, it eliminates the guesswork from building your ideal removable NVMe storage solution.
Main Features
PCIe Gen4 x4 interface with up to 64Gbps total bandwidth
   
SlimSAS 4i (SFF-8654) connector for NVMe storage
   
Integrated PCIe Gen4 redriver for extended signal reach
   
Built-in 100MHz PCIe clock buffer
   
Buffered PERST#, WAKE#, CLKREQ#, SMBCLK, SMBDAT signals
   
Supports PCIe 2.0 / 3.0 / 4.0 / 5.0 slots (x4 physical)
   
Tri-mode HBA/RAID compatible (SFF-9402 Rev 1.1 pin-out)
   
Full-height bracket
   
CE/UKCA/RoHS/REACH compliant
   
2-year limited warranty
Specification
Model: MB408A4
Compatible Drive Type: NVMe
Support Slots: Works with x4 PCIe 2.0/3.0/4.0 or 5.0 slots on motherboards
Host Interface: 1 x PCIe x4 connector
Endpoint Interface: 1 x SlimSAS 4i (SFF-8654), pin-out defined by SFF-9402 Rev 1.1
(Tri-mode HBA/RAID card compatible)
Transfer Rate: PCIe 4.0 x4 up to 64Gbps
Supported Operating Systems: No limitation
Product Dimension (W x H x D): 109.7 x 120.8 x 21.5mm
Product Net Weight: 40.3g
Package Gross Weight: 132.7g
Package Contents: Device, mounting screws, user manual
Connector Insertion Rate: 5,000
Humidity: 5%~65% RH
Operating Temperature: 0°C to 70°C (32°F to 158°F)
Storage Temperature: -35°C to 70°C (-31°F to 158°F)
Compliance: CE, UKCA, RoHS, REACH
Warranty: 2 years limited warranty
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