C41421-003 Intel Dual Port Gigabit Ethernet PCI-Express Adapter

Overview of the Intel PCI‑Express Adapter 

The Intel C41421-003 PCI‑Express Adapter delivers dependable connectivity and streamlined integration for modern enterprise systems. Designed to enhance data throughput and system responsiveness, this adapter supports a wide range of professional workloads.

Core Product Identity

• Brand: Intel
• Manufacturer Part Code: C41421-003
• Product Type: PCI‑Express Expansion Adapter

Technical Information

• Ports: Two RJ-45 copper.
• Speed: 10/100/1000 Mbps per port.
• Interface: PCI-X (not PCIe).
• Bus Width: 64-bit data bus.
• Bus Speed: Up to 133 MHz.
• Cable: Category-5 twisted pair.
• Distance: Up to 100 meters.
• Buffer: 128 KB internal memory.
• Standards: IEEE 802.3ab Gigabit Ethernet.
• VLANs: IEEE 802.1Q tagging support.
• Teaming: IEEE 802.3ad link aggregation.
• Management: Wake-on-LAN (WoL) capable.
• Form Factor: Plug-in internal card.

The Intel Dual Port Gigabit Ethernet PCI-Express Adapter

The C41421-003 Intel Dual Port Gigabit Ethernet PCI-Express Adapter represents a high-performance, enterprise-grade networking solution designed to deliver reliable, scalable, and efficient connectivity for modern data centers, enterprise servers, and workstation environments. Built on Intel’s proven Ethernet controller architecture, this dual-port PCIe network interface card (NIC) enables high-throughput communication, low latency packet processing, and advanced networking features essential for mission-critical workloads, virtualization environments, and cloud infrastructures.

Intel Dual Port Gigabit Ethernet Adapter 

The adapter is engineered around Intel’s Gigabit Ethernet controller technology, integrating dual independent RJ-45 ports capable of delivering 10/100/1000 Mbps speeds per port. This dual-port configuration allows administrators to implement link aggregation, failover redundancy, and load balancing strategies that significantly enhance network resilience and bandwidth utilization.

Designed for PCI Express architecture, the C41421-003 ensures high-speed communication between the network controller and the host system’s CPU and memory subsystem. The PCIe interface reduces bottlenecks common in legacy PCI designs, allowing for more efficient packet processing and improved overall system throughput.

Performance Capabilities and Throughput Optimization

Performance is a core strength of the C41421-003 Intel Dual Port Gigabit Ethernet PCI-Express Adapter. Each port independently supports up to 1 Gbps full-duplex communication, providing a combined theoretical bandwidth of 2 Gbps under optimal configurations. In real-world enterprise environments, the adapter excels in handling mixed workloads, including database transactions, file transfers, virtualization traffic, and streaming services.

Intel’s hardware-based acceleration technologies reduce CPU overhead by offloading critical networking tasks such as TCP segmentation, checksum calculations, and interrupt moderation. This allows server CPUs to focus on application processing rather than network stack management, improving system efficiency and responsiveness.

Enterprise Network Deployment Scenarios

The C41421-003 adapter is widely deployed in enterprise servers, rack-mounted systems, and virtualization hosts where stable and high-speed connectivity is essential. Its dual-port design makes it particularly valuable in environments requiring redundancy and continuous uptime.

In data centers, this adapter is commonly used to separate management traffic from production traffic, ensuring operational stability and secure segmentation. It also plays a critical role in clustered server environments where multiple nodes must communicate seamlessly with minimal latency.

Virtualization and Multi-Tenant Optimization

Modern IT infrastructures increasingly rely on virtualization technologies to maximize resource utilization and operational flexibility. The C41421-003 Intel Dual Port Gigabit Ethernet PCI-Express Adapter is optimized for such environments, providing robust support for virtual machine networking, virtual switches, and isolated network segmentation.

Through features like Virtual Machine Device Queues (VMDq) and SR-IOV (Single Root I/O Virtualization) support in compatible environments, the adapter ensures that network traffic is efficiently distributed among virtual machines without excessive CPU overhead.

Reliability, Redundancy, and Failover Capabilities

One of the defining features of the dual-port architecture is its ability to support network redundancy and failover configurations. In mission-critical environments, network downtime can result in significant operational and financial losses. The C41421-003 mitigates these risks through intelligent failover mechanisms.

When one port experiences connectivity issues, traffic can automatically be rerouted through the secondary port, ensuring uninterrupted service availability. Additionally, link aggregation (LACP) enables both ports to function together as a single logical interface, increasing bandwidth and providing redundancy simultaneously.

Hardware Design and PCI Express Integration

The adapter utilizes a PCI Express interface that ensures high-speed communication between the network card and the system motherboard. This modern bus architecture significantly outperforms older PCI standards by offering dedicated lanes for data transmission, reducing congestion and latency.

The compact and efficient hardware design allows for easy installation in a wide range of server chassis and workstation configurations. Its low-profile compatibility ensures deployment flexibility in space-constrained environments such as blade servers and dense rack systems.

Driver Support and Operating System Compatibility

The C41421-003 Intel Dual Port Gigabit Ethernet PCI-Express Adapter is widely supported across major operating systems, including Windows Server editions, Linux distributions, and virtualization hypervisors. Intel provides stable and regularly updated driver packages that ensure long-term compatibility and security updates.

This extensive compatibility makes it suitable for heterogeneous IT environments where multiple operating systems coexist. System administrators benefit from simplified deployment and reduced maintenance complexity due to standardized driver support.

Security Features in Network Communication

Security is a fundamental requirement in modern networking infrastructure. The C41421-003 adapter incorporates multiple hardware-assisted security features that help protect data integrity and reduce vulnerability to network-based attacks.

Features such as secure offloading, checksum validation, and controlled packet processing contribute to minimizing exposure to malicious traffic and reducing CPU-based attack surfaces.

Energy Efficiency and Thermal Performance

Energy efficiency is an increasingly important consideration in large-scale IT deployments. The Intel Dual Port Gigabit Ethernet PCI-Express Adapter is designed with power management technologies that dynamically adjust energy consumption based on network load.

During periods of low traffic, the adapter reduces power usage without compromising connectivity, contributing to lower operational costs and improved data center efficiency. Its optimized thermal design ensures stable performance even under sustained high-throughput conditions.

Comparison with Single-Port Gigabit Adapters

Compared to single-port NICs, the C41421-003 provides significantly improved flexibility and resilience. While single-port adapters are suitable for basic networking needs, they lack redundancy and scalability. The dual-port design enables advanced configurations such as active-active load balancing or active-passive failover, making it a superior choice for enterprise deployments where uptime and performance are critical.