P14590-B21 HPE Riser Card

High-Performance GPU Expansion Riser Card enabling dual PCIe Gen4 x16 connectivity with the P14590-B21

The P14590-B21 is an HPE passive GPU riser card designed to expose additional high-bandwidth PCIe lanes for accelerator-class expansion in compatible HPE ProLiant server configurations. By providing 2 physical PCIe 4.0 x16 host interfaces, the P14590-B21 supports dense add-in integration where deterministic lane mapping and low-latency signal paths are required for GPU, FPGA, SmartNIC, or high-performance storage controllers.

As a passive riser, P14590-B21 introduces no onboard switching or retiming logic, aligning the expansion topology closely with the CPU PCIe root complex and the platform’s validated signal integrity envelope. This architecture is suited to PCIe Gen4 deployments where predictable device enumeration, stable link training, and serviceable mechanical integration matter as much as raw bandwidth. The result is a straightforward way to scale PCIe-attached resources while keeping the server’s cooling, cabling, and field-replaceable assembly model intact.

Why Choose the P14590-B21?

The P14590-B21 delivers a pragmatic density-to-performance profile for enterprise systems that must add accelerators without redesigning the host platform. Because it is a data centre spare and field replacement part for PCIe riser assemblies, the P14590-B21 supports standardized deployment, rapid maintenance cycles, and configuration consistency across fleets, helping operations teams scale expansion capacity with controlled risk.

HPE engineers these accessories to match ProLiant mechanical tolerances, airflow expectations, and platform validation standards. The focus is on predictable interoperability, lifecycle stability, and service-friendly integration that aligns with modern rack-scale data centre practices and change-controlled hardware baselines.

Key Applications:

• GPU accelerator enablement
• High-bandwidth PCIe add-in expansion
• AI inference and analytics nodes
• HPC compute acceleration
• SmartNIC or DPU integration

At Happyware - Server Hardware you benefit from Non-Binding Offers tailored to your exact ProLiant configuration, helping you source the correct P14590-B21 riser for validated expansion plans, and you can extend coverage with an Extended Warranty up to 6 years for long-term operational security.