Network adapter Dell Mellanox ConnectX-4 LX 25GbE — 25 Gbps Ethernet PCIe

Dell Mellanox ConnectX-4 LX 25GbE is a 25 Gbps Ethernet network adapter for PCIe-equipped servers and workstations. The card delivers high-throughput network connectivity suitable for virtualized environments, storage networks and cloud infrastructure. It is engineered to provide low latency and reliable data transfer for bandwidth‑intensive applications while integrating with standard Ethernet networks.

Advantages

The adapter offers 25GbE throughput over a PCIe interface, supporting consistent data transfer rates and low packet latency. It is compatible with common server platforms and supports advanced offload features to reduce CPU load and improve application efficiency. The design emphasizes stable operation under sustained loads and interoperability with Ethernet networking equipment.

Suitable for

• Virtualized server environments and hyperconverged infrastructure
• High-performance storage networks (NAS, SAN, iSCSI)
• Cloud services, data center aggregation and leaf/spine fabrics
• High-bandwidth applications such as data analytics and media streaming
• Low-latency trading platforms and real-time processing workloads

Key specifications

• Interface: PCI Express (PCIe) for server/workstation expansion
• Network speed: 25 Gbps Ethernet link rate
• Form factor: full‑height add-in card compatible with standard PCIe slots
• Latency profile: designed for low packet latency suitable for real‑time applications
• Compatibility: interoperable with standard Ethernet switching and routing equipment

How to use

Install the adapter into an available PCIe slot in a powered-off server or workstation following manufacturer safety guidelines. Secure the card to the chassis and connect the appropriate 25GbE cable to the network port and corresponding switch or transceiver. After powering on the system, install or update drivers and firmware provided by the server or operating system vendor. Configure network settings, bonding or offload features as required by the environment and validate link status and throughput using diagnostic tools.

Recommendations

For optimal performance, use compatible 25GbE switches and certified cabling or optical transceivers. Keep firmware and drivers up to date and enable hardware offload features where supported to reduce host CPU usage. Verify thermal clearance and airflow in the chassis when deploying multiple high‑speed cards, and perform throughput testing during validation to ensure expected performance in production.