PCIe 4.0 x4 Male to x1 Female Extension Cable, 85-ohm Low Impedance

The PCIe 4.0 x4 Male to x1 Female Extension Cable, 85-ohm Low Impedance, is a high-performance passive adapter solution engineered for next-generation computing systems, data centers, and applications requiring precise impedance matching. This cable adapts a PCIe 4.0 x4 slot interface to a PCIe x1 interface while maintaining a consistent 85-ohm differential impedance to ensure optimal signal integrity at data rates up to 16.0 GT/s. Designed with low-loss materials and robust shielding, this solution is ideal for high-density servers, test benches, or systems requiring strict compliance with PCI-SIG standards for PCIe 4.0 implementations. The cable assembly features a standard male x4 edge connector and a female x1 receptacle, providing reliable form-factor adaptation without compromising signal quality.

Features

• 85-Ohm Impedance Matching: Precisely engineered to maintain 85-ohm differential impedance across the entire cable assembly, reducing signal reflections and ensuring compliance with PCIe 4.0 specifications for improved signal integrity in high-speed applications.
• PCIe 4.0 Compliance: Supports PCIe 4.0 specifications with a data transfer rate of 16.0 GT/s per lane, providing a bandwidth of approximately 2 GB/s for x1 configurations while ensuring backward compatibility with PCIe 3.0/2.0/1.0 devices.
• Enhanced Signal Integrity: Utilizes low-loss twin-axial cables (e.g., 31 AWG precision copper) with multi-layer shielding (foil and braid) to minimize insertion loss, crosstalk, and electromagnetic interference (EMI), ensuring stable performance even in electrically noisy environments.
• Form Factor Adaptation: Enables physical and electrical compatibility between PCIe x4 and x1 interfaces, allowing x1 devices to be installed in x4 slots with optimized signal preservation.
• Passive Extension: Requires no external power or active components, relying on high-quality copper conductors and precise impedance control to maintain signal integrity over extended lengths.
• Durable Construction: Incorporates gold-plated contacts (min. 0.76µm thickness) and reinforced connector housings for corrosion resistance and longevity, capable of withstanding repeated mating cycles in commercial environments.

Specifications

• Product Model: PCIe 4.0 x4 Male to x1 Female Extension Cable, 85-ohm Low Impedance
• Connector A: PCIe 4.0 x4, Male, Edge Connector
• Connector B: PCIe 4.0 x1, Female, Receptacle
• Connector Gender: Male to Female
• Cable Type: Passive Copper Extension Cable
• Pinout Configuration: Standard PCIe-compliant with x4 to x1 lane mapping
• Cable Length: Standard options: 0.25m, 0.5m (Custom lengths up to 1.0m available; beyond may require validation for signal integrity)
• 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 PCIe 4.0 low-loss applications)
• Shielding: Foil and braid shielding for EMI protection
• Operating Temperature: 0°C to +70°C (commercial grade); -40°C to +85°C (industrial options)
• Durability: Minimum 500 insertion cycles
• Safety Standards: RoHS compliant

Applications

• High-Density Data Centers: Deploying in servers and storage systems where PCIe 4.0 extensions are required for add-on cards (e.g., NICs, accelerators), with the 85-ohm impedance ensuring minimal signal loss.
• Test and Development Benches: Facilitating hardware debugging and signal integrity validation where precise impedance matching is critical for probing PCIe 4.0 signals without introducing reflections or attenuation.
• Enterprise Equipment: Supporting enterprise-grade systems requiring compliance with PCIe 4.0 specifications for reliable performance in business-critical applications, such as storage devices and high-speed test equipment.
• Gaming and Workstation Customization: Enabling flexible component placement in custom PC builds where motherboard x1 slots are obstructed, with the 85-ohm cable ensuring stable performance for high-speed devices like capture cards or NVMe adapters.