HPE P24837-B21

642SFP28 Dual‑Port 25 Gb/10 Gb Gigabit Ethernet Adapter (PCIe 3.0 ×8)

The HPE P24837‑B21 (642SFP28) is a high-performance network adapter providing two independent SFP28 ports that support native 25 GbE operation with automatic fallback to 10 GbE speeds. Designed for HPE ProLiant Gen9, Gen10,and Apollo server platforms, it delivers up to 50 Gbps aggregate bandwidth via a PCIe 3.0 ×8 interface. Ideal for virtualization, cloud, and edge workloads, this card enables high-throughput, low‑latency networking with advanced offloads for scalable server infrastructure. 

Features

Built on the Mellanox MCX512A/ConnectX‑4 Lx chipset, the adapter supports SR‑IOV virtualization, RDMA via RoCE v2 or iWARP, and VXLAN/NVGRE tunnel offloads for modern overlay networks. It auto-negotiates between 25 GbE and 10 GbE depending on link partner compatibility. Other features include jumbo frames (~9 KB), VLAN tagging, LACP link aggregation, QoS, RSS, TSO/LSO, VMQ, and PXE boot capability. Compact and energy-efficient (~10 W typical), the card suits dense server deployments without compromising thermal dynamics or expansion flexibility. Fully certified across current HPE platforms with broad OS support, it forms a reliable foundation for virtualization and storage networking needs.

Advanced Options

Engineered for enterprise-class workloads, the adapter delivers consistent high-speed performance with minimal latency. Hardware offloads significantly reduce CPU load under virtualization and storage-heavy workloads, improving efficiency in clustered or hyper-converged environments.