PCIe 4.0 x4 Male Down R/A to x4 Female Up R/A Extension Cable

The PCIe 4.0 x4 Male Down R/A to x4 Female Up R/A Extension Cable is a high-performance passive interconnect solution engineered for complex spatial challenges in next-generation computing systems, data centers, and compact enclosures. This cable features a hybrid right-angle design, combining a Down Right-Angle (Down R/A) male connector for low-profile motherboard insertion and an Up Right-Angle (Up R/A) female connector to accommodate vertical clearance needs for connected add-in cards. Supporting PCIe 4.0 specifications with a data transfer rate of 16.0 GT/s per lane, it delivers a total bandwidth of approximately 7.88 GB/s for x4 configurations while maintaining backward compatibility with PCIe 3.0/2.0/1.0 devices. Engineered with precision 85-ohm impedance-matched wiring (e.g., 31 AWG low-loss twin-axial cable as referenced in 3M’s Gen 4.0 extender assemblies ) and multi-layer shielding, this cable ensures optimal signal integrity at high speeds. The hybrid orientation addresses multi-directional routing challenges in densely packed servers, test benches, or custom workstations, where obstruction avoidance and airflow optimization are critical.

Features

• Hybrid Right-Angle Orientation: Combines a Down R/A male connector for low-profile motherboard insertion and an Up R/A female connector to accommodate vertical clearance for connected devices, enabling flexible cable routing around obstacles in cramped spaces and improving airflow management in high-density setups .
• Full x4 Lane Support: Preserves all four PCIe lanes, ensuring maximum bandwidth utilization of approximately 7.88 GB/s for PCIe 4.0 devices requiring full x4 electrical interfaces.
• 85-Ohm Impedance Matching: Precisely engineered to meet PCIe 4.0 specifications for differential impedance, reducing signal reflections and ensuring signal integrity at 16.0 GT/s data rates, as highlighted in industry designs .
• Enhanced Signal Integrity: Utilizes low-loss twin-axial cables with multi-layer foil and braid shielding to minimize insertion loss, crosstalk, and electromagnetic interference (EMI), ensuring stable performance even in electrically noisy environments .
• Durable Construction: Incorporates gold-plated contacts (e.g., min. 0.76µm thickness ) and reinforced connector housings with strain relief to withstand mechanical stress in commercial or industrial environments. The use of robust materials like ABS protection sleeves enhances longevity .
• Passive Design: Requires no external power or active components, relying on high-quality copper conductors and precise impedance control for reliable signal transmission .

Specifications

• Product Model: PCIe 4.0 x4 Male Down R/A to x4 Female Up R/A Extension Cable
• Connector A: PCIe 4.0 x4, Male, Down Right-Angle (Down R/A)
• Connector B: PCIe 4.0 x4, Female, Up Right-Angle (Up R/A)
• Cable Type: Passive Copper Extension Cable
• Pinout Configuration: Standard PCIe-compliant 1:1 lane mapping, including essential auxiliary signals such as REFCLK+, PERST#, and PRSNT1#/2# for hot-plug support 
• 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, typical for PCIe 4.0 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 Data Centers: Deploying in rack-mounted servers (e.g., 1U/2U configurations) where the hybrid right-angle design optimizes complex cable routing in cramped spaces while maintaining PCIe 4.0 performance for add-on cards such as NICs or accelerators.
• Test and Development Benches: Facilitating hardware validation and signal integrity testing where flexible access to PCIe slots is required for debugging or performance validation, with the hybrid orientation allowing for probing in crowded setups .
• Compact Workstations and Gaming Rigs: Enabling flexible component placement in small-form-factor builds where motherboard slots are obstructed by large cooling solutions or other components, with the Up R/A connector providing clearance for the connected card .
• Industrial and Embedded Systems: Supporting PCIe expansion in ruggedized equipment where reliable high-speed connections and space-efficient multi-directional routing are essential.