900-9X426-0054-SQ0 Nvidia Dual Ports QSFP28 PCIe Network Interface Card

Overview of the QSFP28 Network Interface Card

The 900-9X426-0054-SQ0 Nvidia ConnectX-4 EN Dual-Port QSFP28 PCIe Network Interface Card is a high-performance Ethernet adapter engineered for modern data center infrastructures, enterprise cloud deployments, virtualization environments, and high-throughput storage networking. Designed to deliver exceptional packet processing efficiency, ultra-low latency communication, and advanced hardware acceleration features, this dual-port network interface card enables organizations to scale demanding workloads while maintaining consistent network reliability and reduced CPU overhead.

General Information

• Brand: Nvidia 
• Part Number: 900-9X426-0054-SQ0
• Product Type: Network Interface Card

Technical Features of Interface Card

• Product family: ConnectX-4 EN
• Interface type: PCIe
• Port configuration: Dual-Port
• Connector type: QSFP28
• High-bandwidth Ethernet support
• Hardware acceleration features
• RDMA capabilities
• Virtualization optimization
• Low latency packet processing
• Enterprise reliability design
• Broad server compatibility
• Scalable data center integration

Compatibility

• Linux: In-box support across major distributions including Enterprise Linux (RHEL/Rocky/Alma), Ubuntu, and Debian utilizing the native driver core.
• Hypervisors: Fully supported on VMware vSphere (ESXi), Proxmox VE, and Microsoft Hyper-V.
• Windows: Driver support is available through the NVIDIA WinOF-2 driver package for Windows Server environments.

The Nvidia Dual-Port QSFP28 PCIe Network Interface Card 

Built on Nvidia’s highly regarded ConnectX architecture, the ConnectX-4 EN adapter provides advanced Ethernet connectivity for servers requiring enhanced bandwidth performance, intelligent traffic acceleration, and efficient resource utilization. Equipped with dual QSFP28 ports, the adapter supports high-speed 100GbE connectivity and can also operate in multiple Ethernet modes depending on transceiver and cable configurations, making it ideal for flexible enterprise deployment strategies.

The PCIe-based architecture ensures rapid data transfer between server memory and network resources, supporting latency-sensitive applications such as AI model training, cloud-native orchestration, high-frequency transactional databases, software-defined storage, network function virtualization, and hyperscale computing clusters. Organizations seeking dependable high-speed interconnectivity benefit from the robust feature set integrated into the Nvidia ConnectX-4 EN platform.

Dual-Port QSFP28 and High-Speed Ethernet Performance

The defining characteristic of the 900-9X426-0054-SQ0 Nvidia ConnectX-4 EN adapter is its dual-port QSFP28 interface, designed to support advanced Ethernet networking across modern enterprise environments. Each QSFP28 port enables substantial bandwidth throughput, making the adapter suitable for intensive data transfer operations that require stable and uninterrupted connectivity.

Dual-port functionality offers multiple deployment advantages. Administrators can configure the adapter for redundancy, failover, network segmentation, or aggregated bandwidth to maximize performance. Link aggregation enables multiple physical connections to operate as a single logical interface, significantly improving throughput while enhancing resilience against network interruptions.

High-speed Ethernet performance is essential in environments where rapid communication between servers, storage systems, and switches determines application responsiveness. The ConnectX-4 EN platform delivers optimized packet transmission and reception processing, minimizing bottlenecks in data-intensive workflows. Its architecture supports efficient handling of large data streams, allowing enterprise workloads to scale without compromising network efficiency.

PCIe Interface Architecture and Host System Integration

The PCIe interface integrated into the Nvidia ConnectX-4 EN ensures direct high-speed communication between the network adapter and host server architecture. PCI Express connectivity is critical for minimizing latency and maximizing throughput, particularly in environments running compute-intensive applications or virtualized workloads.

By leveraging advanced PCIe bandwidth capabilities, the adapter reduces communication delays between processors, memory, and network subsystems. This direct data path improves responsiveness for applications requiring immediate access to distributed resources, such as machine learning clusters, distributed databases, and real-time analytics platforms.

Server compatibility remains a key advantage of the ConnectX-4 EN design. The adapter integrates seamlessly into modern rack servers, blade systems, and high-density compute nodes, enabling IT teams to upgrade network performance without significant infrastructure redesign. PCIe deployment also simplifies maintenance and replacement procedures, supporting efficient lifecycle management.

Advanced Hardware Offload Technologies

One of the most significant advantages of the 900-9X426-0054-SQ0 Nvidia ConnectX-4 EN network interface card is its extensive hardware offload engine. Hardware acceleration reduces processor utilization by shifting networking tasks away from the host CPU and onto specialized silicon within the adapter itself.

This capability dramatically improves server efficiency, allowing processors to focus on business-critical applications rather than routine networking operations. Hardware offload becomes particularly valuable in dense virtualization environments, cloud platforms, and storage infrastructures where network processing overhead can significantly impact performance.

Supported offload technologies commonly include checksum offload, TCP segmentation offload, receive side scaling, large receive offload, and stateless packet processing enhancements. These functions collectively improve throughput while minimizing latency and reducing CPU bottlenecks.

Low Latency Networking for Mission-Critical 

Low-latency communication is essential for modern enterprise applications that depend on immediate packet delivery and deterministic network behavior. The Nvidia ConnectX-4 EN is engineered to minimize network delays across demanding operational environments.

Applications such as real-time analytics, financial transaction systems, AI inference pipelines, and distributed storage synchronization require consistently fast response times. Even minor reductions in latency can lead to substantial improvements in overall application performance.

The adapter’s advanced packet processing engine, optimized DMA pathways, and intelligent interrupt handling work together to reduce delays between packet arrival and application delivery. This architecture ensures predictable communication patterns under both standard and peak traffic conditions.

Virtualization and Cloud Infrastructure

Virtualized environments place significant demands on networking hardware, especially when multiple virtual machines or containers share common physical resources. The 900-9X426-0054-SQ0 Nvidia ConnectX-4 EN is designed specifically to address these challenges through virtualization-aware networking technologies.

Support for SR-IOV allows physical network resources to be partitioned into multiple virtual interfaces, enabling direct VM access to network hardware while reducing hypervisor overhead. This improves performance consistency and lowers latency for virtual workloads.

Container orchestration platforms such as Kubernetes also benefit from accelerated network operations. High-speed pod-to-pod communication, service mesh performance, and distributed microservice connectivity all improve when advanced network interface acceleration is available.

Storage Networking and Data Center Fabric Integration

Storage systems increasingly depend on Ethernet-based high-speed interconnects for scalable data movement. The Nvidia ConnectX-4 EN enables robust storage networking capabilities suitable for modern SAN and software-defined storage architectures.

Whether supporting NVMe over Fabrics, distributed object storage, or clustered file systems, the adapter delivers the bandwidth and reliability required to move large volumes of data efficiently. Storage replication, backup transfers, and real-time synchronization operations benefit significantly from enhanced throughput and reduced latency.

In large-scale data center fabrics, consistent east-west traffic flow is essential. The dual-port design allows flexible network topology integration, including spine-leaf architectures and redundant switching strategies.

RDMA and Efficient Memory-to-Memory Communication

Remote Direct Memory Access technology is one of the most powerful capabilities supported by advanced Nvidia networking hardware. RDMA enables direct memory transfers between systems without involving the host CPU, significantly reducing latency and improving application efficiency.

For distributed databases, high-performance computing clusters, AI training nodes, and storage appliances, RDMA can dramatically accelerate data exchange while lowering system overhead.

The ConnectX-4 EN architecture helps enterprises deploy RDMA-enabled infrastructures that support rapid inter-node communication and highly efficient workload distribution.

Enterprise Security and Network Isolation Features

Security remains a foundational requirement in enterprise networking, and the Nvidia ConnectX-4 EN incorporates multiple capabilities that help organizations maintain secure and isolated network environments.

Hardware-enforced isolation mechanisms, secure partitioning, and traffic segmentation support enable administrators to separate workloads according to compliance and operational requirements. Multi-tenant cloud environments benefit from these capabilities by ensuring that network traffic remains isolated between applications and customer workloads.

Advanced firmware integrity protections and controlled device management features also contribute to a more secure infrastructure posture.

Scalability for Hyperscale and Enterprise Data Centers

Data center scalability depends heavily on network hardware that can accommodate increasing bandwidth demands without introducing architectural limitations. The 900-9X426-0054-SQ0 Nvidia ConnectX-4 EN supports scalable deployments across enterprise, cloud, and hyperscale infrastructures.

Organizations expanding virtualization clusters, AI compute farms, or storage networks require adapters capable of sustaining long-term growth. The ConnectX-4 EN provides the throughput and flexibility needed to support these evolving environments.

Dual-port connectivity allows administrators to design resilient scaling strategies while minimizing rack complexity and reducing adapter count requirements.

Compatibility with Modern

Broad operating system compatibility is essential for enterprise hardware adoption. The Nvidia ConnectX-4 EN supports deployment across a wide range of server operating systems, hypervisors, and cloud platforms.

Common compatibility environments include Linux distributions, Windows Server, VMware virtualization platforms, and cloud-native orchestration systems. Driver maturity and management utility support simplify deployment, diagnostics, and firmware updates.

This broad compatibility ensures integration flexibility across mixed-vendor infrastructures and hybrid deployment models.

Energy Efficiency

Modern data centers must balance performance with power efficiency. The Nvidia ConnectX-4 EN incorporates power-conscious engineering to deliver high-speed networking while minimizing energy consumption.

Efficient packet processing reduces overall server CPU load, indirectly lowering total system power requirements. Thermal design enhancements also help maintain stable operating temperatures in densely populated server racks.

Lower power consumption contributes to improved sustainability metrics and reduced operational expenses across large deployments.

Reliability and Continuous Availability

Network reliability is critical in environments where downtime can lead to operational disruption or financial loss. The 900-9X426-0054-SQ0 Nvidia ConnectX-4 EN is engineered for dependable continuous operation.

Enterprise-grade components, firmware resilience, and robust error-handling mechanisms help ensure stable performance under sustained heavy workloads. Dual-port redundancy further enhances availability by enabling failover strategies that protect critical applications from network interruptions.

High availability infrastructures benefit greatly from the adapter’s proven reliability in mission-critical deployment scenarios.

Ideal Use Cases 

The versatility of the Nvidia ConnectX-4 EN makes it suitable for numerous enterprise and advanced computing applications. Organizations requiring high-bandwidth, low-latency networking can deploy this adapter across diverse infrastructure categories.

Advantages of Interface Card

IT administrators benefit from simplified deployment and operational management when integrating the Nvidia ConnectX-4 EN into existing environments. Its standardized PCIe form factor, mature driver ecosystem, and proven enterprise reliability reduce deployment complexity and accelerate infrastructure upgrades.

Network architects can leverage dual-port flexibility to design redundant topologies, optimize traffic distribution, and prepare systems for future bandwidth expansion. Infrastructure teams focused on automation and orchestration can also integrate management workflows with broader data center provisioning systems.

For organizations modernizing legacy networking environments, the 900-9X426-0054-SQ0 Nvidia ConnectX-4 EN provides a practical pathway toward higher performance, improved efficiency, and scalable Ethernet-based infrastructure transformation.