Pasywny Riser Supermicro 2U LHS 4xPCI-E 3.0 x8 R2UW-4E8

The Supermicro R2UW-4E8 is a passive riser card engineered for 2U WIO platforms that require multiple PCI Express expansion slots on the left-hand side (LHS). It provides four PCI-E 3.0 x8 interfaces, enabling structured deployment of additional controllers and adapters in dense server environments.

This riser is designed for systems where signal integrity and mechanical compatibility are critical. As a passive component, it does not modify or amplify signals; it simply routes PCI-E 3.0 x8 lanes between the motherboard and expansion cards, helping maintain predictable latency and throughput within the limits of the host platform.

• Form factor: Compatible with 2U chassis in WIO configurations
• Slot position: LHS (Left Hand Side) installation
• Output interfaces: 4x PCI-E 3.0 x8
• Input interfaces: 4x PCI-E x8
• Design: Passive riser – no active signal conditioning
• Automatic detection: Supported for simplified system configuration
• GPU support: Not supported
• NVMe support: Not supported
• M.2 support: Not supported
• Thermal sensor: Not available

The R2UW-4E8 is suitable for environments where stable PCI-E connectivity is required for network, storage or specialized interface cards, without the need for GPU or NVMe expansion on the riser itself. Automatic detection helps the host system correctly recognize installed adapters, reducing configuration effort and potential compatibility issues.

By using a dedicated 2U LHS riser, system integrators can optimize internal layout, cable routing and airflow, while maintaining a clear separation between motherboard and expansion cards. This contributes to easier maintenance and predictable mechanical integration in rack-mounted deployments.