The HPE DL580 Gen10 9-slot Secondary Riser Kit (872340-B21) maximizes server expansion capabilities with 6 x8 and 3 x16 PCIe slots, delivering exceptional I/O density for mission-critical applications. This enterprise-grade riser kit enables seamless integration of multiple high-performance cards including network adapters, storage controllers, and accelerators while maintaining optimal airflow and thermal management. Key benefits include increased system flexibility, enhanced performance scalability, and future-proof expansion options that support demanding workloads in data centers, virtualization environments, and high-performance computing scenarios. The kit’s robust design ensures reliable operation under heavy loads while simplifying server configuration and reducing deployment complexity.