PCIe 4.0 x4 Male to x4 Female Extension Cable, 85-ohm Low Impedance

The PCIe 4.0 x4 Male to x4 Female Extension Cable, 85-ohm Low Impedance, is a high-performance passive interconnect solution engineered for next-generation computing systems requiring strict impedance control and full bandwidth preservation. This cable extends PCIe 4.0 x4 interfaces with a consistent 85-ohm differential impedance across the assembly, ensuring minimal signal reflection and integrity at data rates up to 16.0 GT/s per lane (total bandwidth ~7.88 GB/s). Designed with low-loss materials (e.g., 31 AWG twin-axial cable ) and multi-layer shielding, it targets applications where precision impedance matching is critical, such as high-density servers, test equipment, and enterprise hardware. The cable maintains backward compatibility with PCIe 3.0/2.0/1.0 devices while addressing signal integrity challenges in extended-reach scenarios.

Features

• 85-Ohm Impedance Matching: Precisely controlled differential impedance (85 ohms) minimizes signal reflections and ensures compliance with PCIe 4.0 specifications, optimizing performance at 16.0 GT/s data rates.
• Full x4 Lane Support: Preserves all four PCIe lanes without bandwidth reduction, delivering ~7.88 GB/s throughput for high-speed devices like NVMe SSDs or accelerators.
• Low-Loss Cable Design: Utilizes 31 AWG twin-axial cables (e.g., 3M™ Low Loss Twin Axial Cable ) with silver-plated signal wires to reduce insertion loss and attenuation at high frequencies.
• Enhanced Shielding: Incorporates multi-layer foil and braid shielding to suppress crosstalk and EMI, critical for stability in electrically noisy environments.
• Robust Construction: Features gold-plated contacts (min. 0.76µm thickness ) and reinforced connectors with strain relief, rated for ?500 insertion cycles in commercial or industrial settings.
• Passive Operation: Requires no external power or active components, leveraging impedance-controlled copper conductors for plug-and-play deployment.

Specifications

• Product Model: PCIe 4.0 x4 Male to x4 Female Extension Cable, 85-ohm Low Impedance
• Connector A: PCIe 4.0 x4, Male, Edge Connector
• Connector B: PCIe 4.0 x4, Female, Receptacle
• Cable Type: Passive Copper Extension Assembly
• Impedance: 85 ohms differential (compliant with PCIe 4.0 standards )
• Data Rate: Up to 16.0 GT/s (PCIe 4.0)
• Supported Protocols: PCI Express 4.0/3.0/2.0/1.0
• Wire Gauge: 31 AWG (high-precision copper, typical for low-loss applications )
• Shielding: Foil and braid for EMI protection
• Cable Length: Standard options: 0.25m, 0.5m, 1.0m (custom lengths up to 1m; 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 Data Centers: Enables flexible card placement in rack-mounted servers (e.g., 1U/2U) where impedance-matched extensions are needed for add-on cards (NICs, GPUs) without signal degradation.
• Signal Integrity Validation: Facilitates precision testing and debugging of PCIe 4.0 systems in R&D labs, where 85-ohm impedance ensures accurate signal probing.
• Enterprise Storage and HPC: Supports high-bandwidth applications (e.g., all-flash arrays, computational clusters) requiring reliable x4 lane integrity over extended distances.
• Custom Workstations: Allows repositioning of PCIe cards in space-constrained builds, maintaining signal quality for graphics cards or capture devices.