PCIe 3.0 x16 Male to x4 Female Down R/A Extension Cable

The PCIe 3.0 x16 Male to x4 Female Down R/A Extension Cable is a specialized passive interconnect solution engineered for space-optimized systems requiring adaptive connectivity between different PCIe slot sizes while maintaining PCIe 3.0 compliance. This cable converts a larger PCIe x16 slot interface into a smaller PCIe x4 interface, supporting a data transfer rate of 8.0 GT/s per lane and delivering a total bandwidth of approximately 3.94 GB/s for the x4 configuration, with backward compatibility to PCIe 2.0/1.0 devices. The design incorporates a Down Right-Angle (Down R/A) female connector that optimizes spatial efficiency by directing the cable downward relative to the motherboard plane, significantly reducing vertical profile in low-clearance environments such as 1U/2U servers, slim chassis, and compact workstations. Engineered with impedance-controlled wiring (targeting 85-ohm differential) and multi-layer shielding, this cable ensures reliable signal integrity while addressing challenging mechanical routing requirements in high-density configurations.

Features

• Advanced Form Factor Adaptation: Provides complete physical and electrical compatibility between PCIe x16 and x4 interfaces, enabling installation of x4 devices in x16 slots while maintaining x4 lane operation speeds.
• Down Right-Angle Space Optimization: The Down R/A female connector directs cable routing downward relative to the motherboard plane, minimizing vertical obstruction and preventing interference with adjacent components in low-profile configurations.
• PCIe 3.0 Compliance: Fully supports PCIe 3.0 specifications with 8.0 GT/s per lane data transfer capability, delivering approximately 3.94 GB/s bandwidth for x4 interface applications.
• Enhanced Signal Integrity Protection: Utilizes multi-layer foil and braid shielding to minimize insertion loss, crosstalk, and electromagnetic interference, ensuring stable performance in demanding environments.
• Robust Passive Design: Operates without external power or active components, leveraging high-quality copper conductors and precision impedance control for reliable plug-and-play functionality.
• Durable Construction: Features reinforced connector housings and strain relief mechanisms to withstand mechanical stress in commercial or industrial applications.

Specifications

• Product Model: PCIe 3.0 x16 Male to x4 Female Down R/A Extension Cable
• Connector A: PCIe 3.0 x16, Male, Edge Connector
• Connector B: PCIe 3.0 x4, Female, Down Right-Angle (Down R/A)
• Cable Type: Passive Copper Extension Assembly
• Pinout Configuration: PCIe-compliant, mapping x16 host interface to x4 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, aligned with PCIe 3.0 standards)
• Cable Length: Standard options: 0.25m, 0.5m (custom lengths up to 1.0m available with validation)
• Wire Gauge: 28-34 AWG (typical for PCIe 3.0 applications)
• Shielding: Multi-layer foil and braid for comprehensive EMI protection
• Operating Temperature: -20°C to +80°C (commercial grade)
• Durability: Minimum 500 insertion cycles
• Safety Standards: RoHS compliant

Applications

• High-Density Server Environments: Ideal for 1U/2U rack-mounted systems where the Down R/A design maximizes space utilization for x4 add-on cards installed in x16 slots.
• Test and Development Platforms: Facilitates comprehensive hardware validation and signal integrity analysis of x4 devices in constrained test environments.
• Compact Workstation Solutions: Enables flexible component placement in space-constrained builds where standard x4 slots are unavailable or obstructed.
• Industrial Computing Applications: Supports reliable PCIe expansion in equipment where both performance and spatial efficiency are critical requirements.