PCIe 3.0 x8 Male to x1 Female Down R/A Extension Cable

The PCIe 3.0 x8 Male to x1 Female Down R/A Extension Cable is a specialized passive interconnect solution engineered for space-constrained systems requiring both form-factor adaptation and optimized spatial efficiency. This cable converts a larger PCIe x8 slot interface into a smaller PCIe x1 interface while incorporating a Down Right-Angle (Down R/A) female connector to minimize vertical profile and facilitate efficient cable routing in low-clearance environments . Supporting PCIe 3.0 specifications with a data transfer rate of 8.0 GT/s per lane, it provides a bandwidth of approximately 984.6 MB/s for the x1 interface while maintaining backward compatibility with PCIe 2.0/1.0 devices. Constructed with impedance-controlled wiring (targeting 85-ohm differential) and multi-layer shielding, this cable minimizes signal degradation while addressing mechanical routing challenges in dense configurations such as 1U/2U servers, test benches, or compact workstations .

Features

• Form Factor Adaptation: Enables physical and electrical compatibility between PCIe x8 and x1 interfaces, allowing x1 devices to be installed in x8 slots while operating at x1 lane speeds.
• Down Right-Angle Connector Optimization: The Down R/A female connector directs the cable downward relative to the motherboard plane, reducing mechanical obstruction in low-profile chassis and improving airflow management in densely packed systems .
• PCIe 3.0 Compliance: Supports PCIe 3.0 specifications with 8.0 GT/s per lane data transfer, leveraging 128b/130b encoding for high-efficiency transmission.
• Enhanced Signal Integrity: Utilizes multi-layer shielding (e.g., foil and braid) to minimize crosstalk, insertion loss, and electromagnetic interference (EMI) .
• Passive Design: Requires no external power or active components, relying on high-quality copper conductors and precise impedance control for reliable operation .
• Durable Construction: Incorporates robust materials such as copper cores  and reinforced housings to withstand repeated mating cycles in commercial or development environments.

Specifications

• Product Model: PCIe 3.0 x8 Male to x1 Female Down R/A Extension Cable
• Connector A: PCIe 3.0 x8, Male, Edge Connector
• Connector B: PCIe 3.0 x1, Female, Down Right-Angle (Down 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 8.0 GT/s (PCIe 3.0)
• Supported Protocols: PCI Express 3.0/2.0/1.0
• Impedance: 85 ohms differential (target, per PCIe 3.0 standards)
• Cable Length: Standard options include 25cm (custom lengths available up to 1.0 m; longer lengths require validation) 
• Wire Gauge: 28–34 AWG (typical for PCIe 3.0 applications)
• Shielding: Foil and braid for EMI protection 
• Operating Temperature: -20°C to +80°C (commercial grade)
• Durability: Minimum 500 insertion cycles
• Safety Standards: RoHS compliant

Applications

• Space-Constrained Servers: Deploying in 1U/2U rack-mounted systems  where the Down R/A design optimizes cable routing in cramped spaces while enabling x1 card installation in x8 slots.
• Test and Development Benches: Facilitating hardware validation and compatibility testing of x1 devices in multi-slot environments, such as debugging or signal integrity analysis.
• Compact Workstations: Enabling flexible component placement in small-form-factor builds where direct motherboard x1 slot access is obstructed by larger components.
• Mining Rigs or Computational Setups: Supporting multiple PCIe devices in dense configurations where lane-count flexibility and efficient cable routing are critical.