PCIe 4.0 x4 Male Down R/A to x1 Female Up R/A Extension Cable

The PCIe 4.0 x4 Male Down R/A to x1 Female Up R/A Extension Cable is a high-performance passive adapter solution engineered for next-generation computing systems, test platforms, and space-constrained environments requiring flexible PCIe topology and hybrid right-angle cable routing. This cable adapts a larger PCIe 4.0 x4 slot interface to a smaller PCIe x1 slot interface, combining a Down Right-Angle (Down R/A) male connector for low-profile motherboard insertion and an Up Right-Angle (Up R/A) female connector to accommodate vertical clearance needs. Supporting PCIe 4.0 specifications with a data transfer rate of 16.0 GT/s per lane, it provides a bandwidth of approximately 2 GB/s for the x1 interface while maintaining backward compatibility with PCIe 3.0/2.0/1.0 devices. Engineered with precision 85-ohm impedance-matched wiring  and multi-layer EMI shielding, this hybrid-orientation cable ensures signal integrity at high speeds. The dual right-angle design addresses complex routing challenges in dense servers, test benches, or custom PC builds where obstruction avoidance and airflow optimization are critical.

Features

• Hybrid Right-Angle Orientation: Combines a Down R/A male connector for low-profile motherboard insertion and an Up R/A female connector to accommodate vertical clearance needs, enabling flexible cable routing around obstacles in cramped spaces and improving airflow in high-density setups .
• 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 ~1.969 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, as referenced in 3M's designs ) 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 space utilization.
• 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 (e.g., min. 0.76µm thickness, per PCI-SIG standards ) and robust insulation materials for corrosion resistance and longevity. The right-angle connectors include reinforced housings to withstand mechanical stress in commercial environments.

Specifications

• Product Model: PCIe 4.0 x4 Male Down R/A to x1 Female Up R/A Extension Cable
• Connector A: PCIe 4.0 x4, Male, Down Right-Angle (Down R/A)
• Connector B: PCIe 4.0 x1, Female, Up Right-Angle (Up R/A)
• 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 and the hybrid right-angle design optimizing cable routing in cramped racks .
• 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, and the hybrid orientation allows for flexible access in crowded setups.
• 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 slots are obstructed, with the 85-ohm cable ensuring stable performance for high-speed devices like capture cards or NVMe adapters, and the hybrid right-angle connectors providing clearance around large GPUs.