PCIe 4.0 x16 Male to x8 Female Extension Cable, Slim Version

The PCIe 4.0 x16 Male to x8 Female Extension Cable (Slim Version) is a high-performance passive interconnect solution engineered for space-constrained next-generation systems requiring adaptive connectivity between different PCIe slot sizes while maintaining PCIe 4.0 compliance. This cable converts a larger PCIe x16 slot interface into a smaller PCIe x8 interface, supporting a data transfer rate of 16.0 GT/s per lane and delivering a total bandwidth of approximately 15.75 GB/s for the x8 configuration, with backward compatibility to PCIe 3.0/2.0/1.0 devices. The slim design incorporates a thin, flexible cable structure (e.g., ultra-slim ribbon cable as seen in SilverStone's RC05 series ) and optimized right-angle connectors to minimize spatial footprint in dense environments such as 1U/2U servers, compact workstations, or Mini-ITX builds. Constructed with 85-ohm impedance-matched wiring (e.g., 31 AWG low-loss twin-axial cable highlighted in 3M’s Gen 4.0 assemblies ) and multi-layer EMI shielding, this cable ensures superior signal integrity while addressing challenging mechanical routing requirements in high-speed applications.

Features

• Slim Form Factor Adaptation: Enables physical and electrical compatibility between PCIe x16 and x8 interfaces with a thin, flexible cable profile, allowing x8 devices (e.g., high-speed network cards or accelerators) to be installed in x16 slots while operating at x8 lane speeds.
• Space-Optimized Design: Utilizes a slim ribbon cable structure (e.g., ultra-slim and highly flexible cable as referenced in SilverStone's designs ) for easy routing in cramped enclosures, reducing obstruction and improving airflow management.
• PCIe 4.0 Compliance: Supports PCIe 4.0 specifications with a data transfer rate of 16.0 GT/s per lane, providing approximately 15.75 GB/s bandwidth for the x8 interface.
• 85-Ohm Impedance Matching: Precisely controlled differential impedance reduces signal reflections and ensures integrity at 16.0 GT/s data rates, critical for PCIe 4.0 applications .
• Enhanced Signal Integrity: Incorporates multi-layer foil and braid shielding (e.g., EMI protection as emphasized in Phanteks’ riser cables ) to minimize insertion loss, crosstalk, and electromagnetic interference.
• Passive Design: Requires no external power or active components, relying on high-quality copper conductors (e.g. as referenced in industry designs ) and robust construction for plug-and-play operation.
• Durable Construction: Features gold-plated contacts (e.g., min. 0.76µm thickness per 3M standards ) and reinforced connector housings with strain relief to withstand mechanical stress in commercial or industrial environments.

Specifications

• Product Model: PCIe 4.0 x16 Male to x8 Female Extension Cable, Slim Version
• Connector A: PCIe 4.0 x16, Male, Edge Connector
• Connector B: PCIe 4.0 x8, Female, Receptacle (Slim Profile)
• Cable Type: Passive Copper Extension Assembly (Slim Ribbon Cable)
• Pinout Configuration: PCIe-compliant, mapping x16 host interface to x8 device lanes
• 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)
• Wire Gauge: 31 AWG (high-precision copper, optimized for low-loss applications)
• Shielding: Multi-layer foil and braid for comprehensive EMI protection
• Cable Length: Standard options: 0.25m, 0.5m (custom lengths up to 1.0m available; longer lengths require validation)
• Operating Temperature: -40°C to +85°C (industrial grade)
• Durability: Minimum 500 insertion cycles
• Safety Standards: RoHS compliant

Applications

• High-Density Servers: Deploying in rack-mounted systems (e.g., 1U/2U configurations) where the slim design optimizes cable routing in cramped spaces for x8 add-on cards (e.g., NICs or accelerators) installed in x16 slots.
• Compact Workstations: Enabling flexible component placement in small-form-factor builds (e.g., Mini-ITX cases) where standard x8 slots are unavailable or obstructed by larger components.
• Test and Development Benches: Facilitating hardware validation and signal integrity analysis of x8 devices in multi-slot environments at PCIe 4.0 speeds.
• Multi-GPU Configurations: Supporting secondary graphics cards or computational accelerators in x8 mode when the primary x16 slot is occupied, without sacrificing spatial efficiency.