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

The PCIe 4.0 x4 Male to x4 Female Down R/A Extension Cable is a high-speed passive interconnect solution engineered for space-constrained systems requiring full PCIe 4.0 bandwidth extension with optimized spatial efficiency. This cable assembly features a Down Right-Angle (Down R/A) connector that minimizes vertical profile during installation, directing the cable downward relative to the motherboard plane to prevent interference in low-clearance environments such as 1U/2U servers or compact workstations. Supporting PCIe 4.0 specifications with a data transfer rate of 16.0 GT/s per lane, it delivers a total bandwidth of approximately 7.88 GB/s for x4 configurations while maintaining backward compatibility with PCIe 3.0/2.0/1.0 devices. Constructed with precision 85-ohm impedance-matched wiring (e.g., 31 AWG low-loss twin-axial cable as used in 3M’s PCIe 4.0 extender assemblies) and multi-layer shielding, this cable ensures signal integrity at high speeds. The Down R/A design addresses mechanical routing challenges in dense configurations, making it ideal for high-density data centers, test benches, and industrial systems where airflow management and component accessibility are critical.

Features

• Down Right-Angle Connector Optimization: The Down R/A design (typically on the female end) directs the cable downward relative to the motherboard plane, reducing mechanical obstruction in low-profile chassis and improving airflow management in densely packed systems.
• Full x4 Lane Support: Preserves all four PCIe lanes, ensuring maximum bandwidth utilization of approximately 7.88 GB/s for PCIe 4.0 devices requiring full x4 electrical interfaces.
• PCIe 4.0 Compliance: Supports PCIe 4.0 specifications with a data transfer rate of 16.0 GT/s per lane while maintaining backward compatibility with previous PCIe generations.
• 85-Ohm Impedance Matching: Precisely engineered to meet PCIe 4.0 specifications for differential impedance, reducing signal reflections and ensuring signal integrity at high data rates, as highlighted in 3M’s Gen 4.0 extender assemblies.
• 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), ensuring stable performance even in electrically noisy environments.
• Durable Construction: Incorporates gold-plated contacts and reinforced connector housings with strain relief to withstand mechanical stress in commercial or industrial environments.

Specifications

• Product Model: PCIe 4.0 x4 Male to x4 Female Down R/A Extension Cable
• Connector A: PCIe 4.0 x4, Male, Edge Connector (Straight)
• Connector B: PCIe 4.0 x4, Female, Down Right-Angle (Down R/A)
• Cable Type: Passive Copper Extension Cable
• Pinout Configuration: Standard PCIe-compliant 1:1 lane mapping
• 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, as seen in 3M’s solutions)
• Wire Gauge: 31 AWG (high-precision copper, typical for PCIe 4.0 low-loss applications)
• Shielding: Foil and braid for comprehensive 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, consistent with Molex cable specifications)
• Durability: Minimum 500 insertion cycles
• Safety Standards: RoHS compliant

Applications

• High-Density Data Centers: Deploying in 1U/2U rack-mounted servers where the Down R/A connector optimizes cable routing in cramped spaces while maintaining PCIe 4.0 performance for add-on cards such as NICs or accelerators.
• Test and Development Benches: Facilitating hardware validation and signal integrity testing of PCIe 4.0 x4 devices where flexible access and low-profile connectivity are required.
• Embedded and Industrial Systems: Supporting PCIe expansion in ruggedized equipment where reliable high-speed connections and space-efficient routing are essential.
• Gaming and Workstation Customization: Enabling flexible component placement in small-form-factor builds where direct slot access is obstructed by large components.