PCIe 3.0 x16 Male to x8 Female Extension Cable

The PCIe 3.0 x16 Male to x8 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 x8 interface, supporting a data transfer rate of 8.0 GT/s per lane and delivering a total bandwidth of approximately 7.88 GB/s for the x8 configuration, with backward compatibility to PCIe 2.0/1.0 devices. Constructed with impedance-controlled wiring (targeting 85-ohm differential) and multi-layer shielding, 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 x8 interfaces, allowing x8 devices (e.g., high-speed network cards or controllers) to be installed in x16 slots while operating at x8 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 cases, where spatial constraints exist.

Specifications

• Product Model: PCIe 3.0 x16 Male to x8 Female Extension Cable
• Connector A: PCIe 3.0 x16, Male, Edge Connector
• Connector B: PCIe 3.0 x8, Female, Receptacle
• Cable Type: Passive Copper Extension Assembly
• Pinout Configuration: PCIe-compliant, mapping x16 host interface to x8 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 x8 add-on cards (e.g., NICs or accelerators) need installation in x16 slots for space optimization.
• Test and Development Benches: Facilitating hardware validation and signal integrity analysis of x8 devices in multi-slot environments, enabling debugging or compatibility testing.
• Compact Workstations: Enabling flexible component placement in small-form-factor builds where motherboard x8 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.