PCIe 3.0 x16 Male to x4 Female Extension Cable

The PCIe 3.0 x16 Male to x4 Female Extension Cable is a specialized passive interconnect solution engineered for 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. Constructed with impedance-controlled wiring (targeting 85-ohm differential) and multi-layer shielding (e.g., foil and braid as used in 3M’s 8KXX series cables ), this cable minimizes signal degradation over extended distances. The design addresses form-factor adaptation needs in space-constrained environments such as test benches, compact workstations, or servers, where flexible card placement is critical without sacrificing signal integrity.

Features

• Form Factor Adaptation: Enables physical and electrical compatibility between PCIe x16 and x4 interfaces, allowing x4 devices (e.g., NVMe SSDs or network controllers) to be installed in x16 slots while operating at x4 lane speeds.
• PCIe 3.0 Compliance: Supports PCIe 3.0 specifications with a data transfer rate of 8.0 GT/s per lane, leveraging 128b/130b encoding for efficient data transmission .
• Enhanced Shielding: Utilizes multi-layer foil and braid shielding to minimize crosstalk, insertion loss, and electromagnetic interference (EMI), ensuring stable performance in high-frequency environments .
• Passive Design: Requires no external power or active components, relying on high-quality copper conductors (e.g., 28–34 AWG, as seen in industry designs ) and precise impedance control for reliable operation.
• Durable Construction: Incorporates robust materials such as shielded connectors and reinforced housings, rated for ?500 insertion cycles in commercial or development environments.
• Space-Efficient Routing: The flexible cable assembly facilitates installation in cramped enclosures, such as 1U/2U servers or custom ITX cases, where spatial constraints exist.

Specifications

• Product Model: PCIe 3.0 x16 Male to x4 Female Extension Cable
• Connector A: PCIe 3.0 x16, Male, Edge Connector
• Connector B: PCIe 3.0 x4, Female, Receptacle
• 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; longer lengths require validation)
• Wire Gauge: 28–34 AWG (typical for PCIe 3.0 low-loss applications )
• Shielding: Foil and braid for EMI protection
• Operating Temperature: -40°C to +85°C (industrial grade, consistent with 3M’s 8KXX series )
• Durability: Minimum 500 insertion cycles
• Safety Standards: RoHS compliant

Applications

• High-Density Servers: Deploying in rack-mounted systems (e.g., 1U/2U configurations) where x4 add-on cards (e.g., NICs or controllers) need installation in x16 slots for space optimization.
• Test and Development Benches: Facilitating hardware validation and signal integrity analysis of x4 devices in multi-slot environments, enabling debugging or compatibility testing.
• Compact Workstations: Enabling flexible component placement in small-form-factor builds where motherboard x4 slots are obstructed by larger components like GPUs or cooling systems.
• Mining Rigs or Computational Setups: Supporting multiple PCIe devices in dense configurations where lane-count flexibility and efficient cable routing are critical .