HPE 851279-B21

Dual-Ports 10Gbps SFP+ OCP Mezzanine Network Adapter (Model 851279-B21)

The HPE 851279-B21 Network Adapter is a dual-port 10 Gbps SFP+ mezzanine card designed for high-density, high-performance server connectivity. Tailored for HPE OCP (Open Compute Project) mezzanine slots, it enables up to 20 Gb/s aggregated bandwidth via two fibre-optic or DAC SFP+ modules. Whether used for server clustering, virtualization, storage uplinks, or demanding data center environments, this adapter offers reliable, low-latency 10G links in a slim, integrated form factor. Its mezzanine design maintains clean cabling and optimal airflow, making it a seamless addition to modern HPE server architectures

Features

Deploying in OCP mezzanine slots, the HPE 851279-B21 offers a space-efficient solution for upgrading server networks to 10 GbE speeds without full-sized NIC cards. It supports two SFP+ ports (10 Gbps each), using industry-standard 10GBase-X and optical or DAC interfaces for flexible deployment across short- and long-range links . This mezzanine adapter is especially beneficial in densely packed chassis, preserving rack space and allowing layered connectivity enhancements with minimal cabling. It’s a value-focused choice in bandwidth upgrades, offered extensively in refurbished condition with 90-day to 1-year warranties—and occasionally available new with full support options 

Advanced Options

Engineered for dependable performance, the HPE 851279-B21 delivers consistent 10 GbE throughput via two independent channels, ideal for load balancing, link aggregation, or redundancy setups . Its mezzanine design eliminates extra cabling and reduces airflow obstruction, enhancing thermal efficiency in rack-mounted servers—a key advantage in dense deployments. Additionally, the adoption of widely supported SFP+ interfaces ensures compatibility with a broad array of transceivers and cable types, promoting flexibility and simplified maintenance. Vendors offer refurbishment with at least a 90-day warranty, while some provide new units with standard 1-year support, ensuring affordability without compromising reliability