HP 641SFP28 Network Adapter - 10GbE/25GbE Dual Port SFP28 PCIe 3.0 x8

The HP 641SFP28 Network Adapter is a high-performance dual-port 25 Gigabit Ethernet adapter designed for HPE ProLiant Gen9 and Gen10 servers. Featuring the Mellanox ConnectX-4 Lx controller, it delivers up to 50 Gbps aggregate bandwidth with support for both 10GbE and 25GbE speeds. This low-profile plug-in card offers advanced features such as RDMA over Converged Ethernet (RoCE), SR-IOV, and network virtualization (VXLAN, NVGRE), making it ideal for data centers and enterprise environments requiring high throughput and low latency.

Advantages

With dual SFP28 ports, the HP 641SFP28 provides flexible connectivity for high-speed networks. It supports a wide range of operating systems including Windows Server, Linux distributions, and VMware ESXi. The included low-profile and full-height brackets ensure compatibility with various server chassis. Energy Efficient Ethernet (EEE) helps reduce power consumption, while advanced offload engines free up CPU resources for application performance.

Suitable for

• Enterprise data centers requiring high-bandwidth 25GbE connectivity
• Virtualized environments leveraging SR-IOV and RoCE for efficient resource utilization
• High-performance computing (HPC) and storage networks
• HPE ProLiant Gen9 and Gen10 server upgrades

Key specifications

• Device Type: Network Adapter
• Form Factor: Plug-in Card (Low Profile)
• Interface: PCI Express 3.0 x8
• Ports: 2 x 25 Gigabit Ethernet (SFP28)
• Data Link Protocol: 10 Gigabit Ethernet, 25 Gigabit Ethernet
• Data Transfer Rate: 50 Gbps aggregate, 25 Gbps per port
• Controller: Mellanox ConnectX-4 Lx
• Connectivity Technology: Wired
• Supported Cabling: SFP28 Direct Attach Copper (DAC), SFP28 Optical Transceivers
• Power Consumption: 10.5 W (maximum)
• Included Brackets: Low-profile and full-height

Recommendations

For optimal performance, pair this adapter with compatible SFP28 transceivers or DAC cables. Ensure your server has an available PCIe 3.0 x8 slot. This adapter is ideal for upgrading network infrastructure to 25GbE without replacing existing 10GbE equipment, as it supports both speeds.