PCIe 4.0 x8 Male to x1 Female Up R/A Extension Cable

  The PCIe 4.0 x8 Male to x1 Female Up R/A Extension Cable is a specialized passive interconnect solution engineered for space-constrained systems requiring adaptive connectivity between different PCIe slot sizes while maintaining PCIe 4.0 compliance. This cable converts a larger PCIe x8 slot interface into a smaller PCIe x1 interface, supporting a data transfer rate of 16.0 GT/s per lane and delivering a bandwidth of approximately 2 GB/s for the x1 interface, with backward compatibility to PCIe 3.0/2.0/1.0 devices. The design incorporates an Up Right-Angle (Up R/A) female connector that optimizes vertical clearance by directing the cable upward relative to the motherboard plane, reducing mechanical obstruction in dense configurations such as 1U/2U servers or compact workstations. Constructed with 85-ohm impedance-matched wiring (e.g., 31 AWG low-loss twin-axial cable as referenced in 3M’s Gen 4.0 extender assemblies ) and multi-layer shielding, this cable minimizes signal degradation and ensures stable performance in high-speed applications. The passive design addresses both form-factor adaptation and cable routing challenges, making it ideal for test benches, data centers, and custom systems where flexible card placement is critical.

Features

• Form Factor Adaptation: Enables physical and electrical compatibility between PCIe x8 and x1 interfaces, allowing x1 devices (e.g., NICs or capture cards) to be installed in x8 slots while operating at x1 lane speeds .
• Up Right-Angle Connector Optimization: The Up R/A female connector facilitates upward cable routing, minimizing interference with adjacent components (e.g., GPUs or cooling systems) and improving airflow management in cramped enclosures.
• PCIe 4.0 Compliance: Supports PCIe 4.0 specifications with a data transfer rate of 16.0 GT/s per lane, leveraging 128b/130b encoding for high-efficiency transmission .
• 85-Ohm Impedance Matching: Precisely controlled differential impedance reduces signal reflections and ensures integrity at 16.0 GT/s data rates, critical for PCIe 4.0 applications .
• Enhanced Signal Integrity: Utilizes low-loss twin-axial cables with multi-layer foil and braid shielding to minimize insertion loss, crosstalk, and electromagnetic interference (EMI) .
• Passive Design: Requires no external power or active components, relying on high-quality copper conductors (e.g. ) and robust construction for plug-and-play operation.
• Durable Construction: Incorporates gold-plated contacts (e.g., min. 0.76µm thickness ) and reinforced housings to withstand mechanical stress in commercial or industrial environments.

Specifications

• Product Model: PCIe 4.0 x8 Male to x1 Female Up R/A Extension Cable
• Connector A: PCIe 4.0 x8, Male, Edge Connector
• Connector B: PCIe 4.0 x1, Female, Up Right-Angle (Up R/A)
• Cable Type: Passive Copper Extension Assembly
• Pinout Configuration: PCIe-compliant, mapping x8 host interface to x1 device lanes
• Data Rate Support: Up to 16.0 GT/s (PCIe 4.0) 
• Supported Protocols: PCI Express 4.0/3.0/2.0/1.0
• Impedance: 85 ohms differential (compliant with PCIe 4.0 standards )
• Wire Gauge: 31 AWG (high-precision copper, typical for low-loss applications )
• Shielding: Foil and braid for comprehensive EMI protection 
• Cable Length: Standard options: 0.25m, 0.5m (custom lengths up to 1.0m available; longer lengths require validation )
• Operating Temperature: -40°C to +85°C (industrial grade )
• Durability: Minimum 500 insertion cycles
• Safety Standards: RoHS compliant 

Applications

• High-Density Servers: Deploying in rack-mounted systems (e.g., 1U/2U configurations) where the Up R/A design optimizes vertical clearance for x1 add-on cards (e.g., NICs or controllers) installed in x8 slots .
• Test and Development Benches: Facilitating hardware validation and signal integrity analysis of x1 devices in multi-slot environments, with the Up R/A connector enabling accessible probing and debugging .
• Compact Workstations: Enabling flexible component placement in small-form-factor builds where motherboard x1 slots are obstructed by larger components like GPUs or cooling solutions.
• Industrial and Embedded Systems: Supporting PCIe expansion in ruggedized equipment where reliable high-speed connections and space-efficient routing are essential .