HPE CX455A 

840QSFP28 1‑Port 100 GbE Ethernet/InfiniBand Network Adapter

The HPE CX455A—also known as part number 825110‑B21 or P02012‑B21—is a premium 100 Gigabit Ethernet or InfiniBand Enhanced Data Rate (HDR100) adapter featuring a single QSFP28 port. Designed for HPE ProLiant (Gen9/Gen10), Apollo, and XL platforms, this adapter delivers ultra-low latency and high reliability for cluster computing, storage fabrics, and network-intensive applications. Supporting both 100 Gb Ethernet and HDR100 InfiniBand transports, it enables flexible high-performance networking in demanding enterprise and HPC environments.

Features

Using a PCIe 3.0 ×16 host interface, the CX455A delivers full line-rate 100 Gb/s throughput via a QSFP28 port compatible with passive direct‑attach copper (DAC) or active optical cable (AOC). It supports both standard Ethernet and InfiniBand protocols, allowing deployment in fabric clusters or high-throughput server-to-switch topologies. The card includes advanced features such as TCP/IP offload, VLAN, network fault tolerance, and PXE boot support, optimizing server performance and configuration flexibility. Compatible across HPE ProLiant DL360/380/DL560/DL580 Gen9/10, Apollo 6500, SX40, and other HPC nodes, the adapter is ideal for demanding compute or storage traffic.

Advanced Options

Engineered for ultra-low latency environments, the CX455A ensures consistent 100 Gbps throughput with minimal host CPU involvement thanks to integrated offload functionality. Reliability features such as VLAN support and network fault tolerance (NFT) help maintain uninterrupted data flow.