HPE P25960-B21 Mellanox MCX623106AS QSFP56 Adapter PL-Si

HPE P25960-B21 – Mellanox MCX623106AS-CDAT Dual-Port 100 GbE QSFP56 Adapter

Overview

The HPE P25960-B21 is a dual-port 100 GbE server adapter (based on the Mellanox MCX623106AS-CDAT) designed for high-performance computing, hyper-scale data centres or environments with heavy east-west traffic. It supports two QSFP56 ports, enabling 100 Gb per port or breakout configurations (e.g., 4×25 Gb) in servers via a PCIe 4.0 x16 slot. Fit this into an HPE Gen10/Gen10+ server or compatible platform and use it for ultra-low-latency, high-bandwidth connectivity—ideal for storage fabrics, compute clusters, or switch uplinks. It brings enterprise-grade Ethernet and RoCE capabilities for workloads demanding high throughput and low latency.

Key Features

• Dual QSFP56 ports supporting 100 GbE each; supports breakout to 4×25 Gb per port for flexible deployment.

• PCIe 4.0 ×16 interface ensures full bandwidth to the host, supporting up to ~200 Gb/s aggregate throughput (2 × 100 Gb) as listed. 

• Vendor-qualified HPE part (MCX623106AS-CDAT variant) ensures compatibility, firmware support and full integration with HPE server ecosystems.

• Optimised for high-density, latency-sensitive environments—with features such as RDMA over Converged Ethernet (RoCE), industry-leading offloads and efficient CPU use.

Technical Specifications