MCX516A-CCAT Mellanox ConnectX-5 - Network Adapter - PCI Express 3.0 X16 - 100GbE QSFP X 2

Mellanox MCX516A-CCAT 100Gb Ethernet Adapter Overview

The Mellanox MCX516A-CCAT ConnectX-5 EN 100 Gigabit Ethernet Adapter is a high-performance PCI Express network interface card engineered for modern enterprise data centers, cloud computing environments, virtualization platforms, and high-performance computing (HPC). Designed to deliver ultra-fast network connectivity, this dual-port 100GbE adapter provides exceptional bandwidth, reduced latency, and reliable data transmission for demanding workloads.

Powered by the advanced ConnectX-5 architecture, the MCX516A-CCAT network adapter supports multiple Ethernet speeds, making it a flexible solution for organizations upgrading existing infrastructure or deploying next-generation networking environments. Its PCI Express 3.0 x16 interface ensures maximum throughput between the server and network, enabling efficient application performance and improved overall system responsiveness.

General Information

• Manufacturer: Mellanox
• Model Number: MCX516A-CCAT
• Series: ConnectX-5 EN
• Product Type: Ethernet Network Adapter

Technical Specifications

• Product Family: ConnectX-5 EN
• Device Type: Ethernet Network Adapter
• Form Factor: Plug-in Card
• Host Interface: PCI Express 3.0 x16
• PCIe Revision: PCIe 3.0
• Network Ports: 2 × QSFP28
• Connectivity: Wired
• Maximum Data Rate: 100 Gbps
• Supported Network Standards: 1GbE, 10GbE, 25GbE, 40GbE, 50GbE, and 100GbE

Networking Features

Dual QSFP28 Ports

• 2 × QSFP28 100 Gigabit Ethernet ports
• High-density network connectivity
• Reliable wired communication
• Optimized for large-scale server deployments

Supported Ethernet Standards

• Gigabit Ethernet (1GbE)
• 10 Gigabit Ethernet (10GbE)
• 25 Gigabit Ethernet (25GbE)
• 40 Gigabit Ethernet (40GbE)
• 50 Gigabit Ethernet (50GbE)
• 100 Gigabit Ethernet (100GbE)

Bandwidth Advantages

• Accelerates data-intensive applications
• Minimizes network congestion
• Enhances storage performance
• Supports high-volume virtualization traffic
• Improves cloud computing efficiency

Designed for Modern IT Infrastructure

• Enterprise data centers
• Cloud computing platforms
• Virtualized server environments
• High-performance computing (HPC)
• Artificial intelligence infrastructure
• Machine learning clusters
• Software-defined networking
• Network-attached storage systems

Advantages of the Mellanox MCX516A-CCAT

• Dual-port 100GbE connectivity for increased network capacity
• Advanced ConnectX-5 architecture for enterprise-class performance
• PCIe 3.0 x16 interface for maximum server bandwidth
• Support for multiple Ethernet speeds from 1GbE to 100GbE
• Low-latency communication for demanding applications
• High reliability for mission-critical networking
• Scalable solution for growing business environments
• Ideal for cloud, storage, virtualization, and HPC deployments

Mellanox MCX516A-CCAT ConnectX-5 EN 100-Gigabit Adapter

The Mellanox MCX516A-CCAT ConnectX-5 EN 100-Gigabit Ethernet Adapter represents a significant advancement in enterprise networking technology, delivering exceptional bandwidth, ultra-low latency, and reliable Ethernet connectivity for modern data centers, cloud infrastructures, virtualization platforms, and high-performance computing environments. Designed to meet the increasing demands of today's digital workloads, this adapter enables organizations to achieve superior network performance while maintaining scalability, efficiency, and long-term reliability.

Built upon the renowned ConnectX-5 architecture, the MCX516A-CCAT offers high-speed 100 Gigabit Ethernet connectivity that supports bandwidth-intensive applications including artificial intelligence, machine learning, software-defined storage, virtualization, cloud computing, media streaming, financial trading, and scientific research. Its advanced hardware acceleration capabilities significantly reduce CPU overhead, allowing servers to dedicate more resources to application processing instead of networking tasks.

Organizations deploying modern server infrastructures require networking hardware capable of supporting continuous data movement without creating performance bottlenecks. The Mellanox MCX516A-CCAT fulfills these requirements by combining PCI Express technology with intelligent packet processing, advanced offloading features, and optimized Ethernet performance. The result is faster application response times, lower latency, improved throughput, and enhanced operational efficiency across various enterprise environments.

As digital transformation continues to accelerate, businesses increasingly rely on high-speed network adapters to support virtual machines, containerized workloads, distributed storage clusters, and cloud-native applications. The ConnectX-5 EN family has become one of the preferred networking solutions because it delivers enterprise-grade stability while remaining compatible with a broad range of operating systems, server platforms, and networking architectures.

Advanced ConnectX-5 EN Architecture

Designed for Enterprise-Class Performance

The ConnectX-5 EN architecture introduces multiple hardware innovations that maximize networking efficiency while minimizing system overhead. Instead of relying solely on software processing for packet handling, the adapter incorporates specialized hardware engines that accelerate networking operations directly on the card.

This architecture enables servers to maintain consistent network performance even during periods of heavy utilization. Applications handling massive datasets, real-time analytics, distributed databases, or storage traffic benefit from predictable latency and sustained bandwidth, ensuring business-critical workloads continue operating efficiently.

Optimized PCI Express Connectivity

The MCX516A-CCAT utilizes a PCI Express interface that provides the bandwidth necessary to support full 100 Gigabit Ethernet throughput. High-speed PCIe connectivity minimizes internal communication delays between the server processor and the network adapter while ensuring maximum data transfer efficiency.

The PCI Express architecture also enables future scalability by supporting increasingly demanding workloads without requiring extensive infrastructure modifications. This flexibility makes the adapter suitable for long-term deployment strategies where network growth and expanding application requirements are expected.

100 Gigabit Ethernet Performance Capabilities

Ultra-High Bandwidth Networking

One of the defining characteristics of the Mellanox MCX516A-CCAT ConnectX-5 EN adapter is its ability to provide full 100 Gigabit Ethernet bandwidth. This level of performance supports modern enterprise workloads that continuously exchange large volumes of data between servers, storage systems, and cloud infrastructures.

High-bandwidth connectivity enables organizations to reduce network congestion while improving overall infrastructure responsiveness. Applications involving large file transfers, backup operations, virtualization migration, distributed computing, and real-time analytics all benefit from increased network capacity.

Low Latency Communication

Latency plays a critical role in enterprise networking, particularly for environments requiring real-time communication between distributed systems. The ConnectX-5 architecture minimizes latency through optimized hardware design, efficient packet forwarding, and advanced acceleration technologies.

Reduced latency improves application responsiveness across virtualization clusters, cloud environments, financial platforms, database replication systems, and high-performance computing applications where every microsecond contributes to overall performance.

Consistent Throughput Under Heavy Workloads

Unlike conventional network adapters that may experience performance degradation during peak utilization, the MCX516A-CCAT is engineered to maintain stable throughput even when processing millions of packets per second. Hardware acceleration ensures network performance remains consistent regardless of workload intensity.

Hardware Offload Technologies

CPU Resource Optimization

One of the primary advantages of the ConnectX-5 EN platform is its extensive support for hardware offloading. Instead of forcing the server processor to perform repetitive networking tasks, the adapter executes these operations independently through dedicated hardware engines.

This reduces CPU utilization while increasing the number of application workloads a server can simultaneously support. Lower processor overhead translates directly into improved virtual machine density, faster application execution, and greater infrastructure efficiency.

TCP Segmentation Offload

TCP Segmentation Offload allows the operating system to send large data blocks to the adapter, where segmentation occurs in hardware. This reduces processor interrupts while improving transmission efficiency for high-speed Ethernet communication.

Receive Side Scaling

Receive Side Scaling distributes incoming network traffic across multiple processor cores. Rather than overloading a single CPU core, packet processing becomes balanced across available computing resources, significantly improving multi-core server performance.

Checksum Offloading

Checksum calculations are performed directly by the adapter instead of the host processor. Hardware checksum offloading improves networking efficiency while reducing computational overhead associated with Ethernet packet validation.

Large Receive Offload

Large Receive Offload combines multiple incoming packets into larger buffers before forwarding them to the operating system. This optimization decreases interrupt frequency and improves overall server networking efficiency.

Virtualization Optimization

Virtual Machine Acceleration

The Mellanox MCX516A-CCAT is designed specifically for highly virtualized infrastructures where numerous virtual machines compete for network resources. Hardware virtualization features provide dedicated networking capabilities while minimizing contention between workloads.

Virtualized servers benefit from improved network isolation, faster packet delivery, reduced CPU overhead, and more predictable performance across multiple guest operating systems.

Support for Hypervisor Platforms

The ConnectX-5 EN adapter integrates seamlessly with leading enterprise hypervisors, enabling efficient deployment within virtualization clusters. Hardware acceleration technologies complement software-defined networking solutions while maintaining excellent compatibility with enterprise management tools.

SR-IOV Technology

Single Root I/O Virtualization allows multiple virtual machines to access dedicated virtual functions directly on the adapter. This approach significantly reduces latency while increasing network throughput for virtualized applications.

Cloud Computing Infrastructure

Cloud-Native Network Performance

Cloud environments depend upon reliable, scalable networking that supports thousands of concurrent workloads. The MCX516A-CCAT delivers consistent bandwidth and intelligent traffic management that helps cloud platforms maintain predictable performance regardless of workload fluctuations.

Public clouds, private clouds, and hybrid cloud deployments benefit from hardware acceleration that improves resource utilization while reducing infrastructure operating costs.

Container Networking

Modern containerized applications generate extensive east-west traffic between microservices. High-speed Ethernet connectivity allows containers to exchange information rapidly while maintaining low latency and minimal resource consumption.

The adapter supports container orchestration platforms by providing networking performance capable of handling large-scale Kubernetes deployments and microservices architectures.

Storage Networking Performance

Accelerating Software-Defined Storage

Software-defined storage systems depend on reliable network communication between storage nodes. The ConnectX-5 EN adapter enables rapid data synchronization while supporting large-scale distributed storage infrastructures with exceptional bandwidth and low latency.

Fast storage networking improves backup performance, disaster recovery operations, database replication, and high-availability storage clusters.

NVMe over Fabrics Support

High-performance storage environments increasingly utilize NVMe over Fabrics to extend NVMe storage across Ethernet networks. The MCX516A-CCAT provides the bandwidth and responsiveness required for low-latency storage communication while maximizing flash storage performance.

High-Speed Backup Operations

Enterprise backup windows continue to shrink as organizations generate larger datasets. The adapter's 100 Gigabit Ethernet connectivity enables faster backup transfers, shorter recovery times, and improved business continuity planning.

Data Center Scalability

Supporting Infrastructure Growth

Enterprise networks must accommodate increasing numbers of servers, storage systems, virtual machines, and cloud services. The MCX516A-CCAT provides scalable networking that supports long-term infrastructure expansion without sacrificing performance.

Its advanced architecture enables organizations to increase workload density while maintaining network efficiency across expanding data center deployments.

East-West Traffic Optimization

Modern applications generate significant east-west traffic between servers rather than traditional north-south communication. The ConnectX-5 EN platform is optimized for this traffic pattern, improving application responsiveness and reducing internal network bottlenecks.

Reliability and Enterprise Stability

Continuous Operation

Enterprise networking hardware must operate reliably around the clock. The Mellanox MCX516A-CCAT is engineered for continuous deployment in mission-critical environments where downtime directly impacts business operations.

Its robust hardware design supports sustained workloads while maintaining consistent network performance over extended operational periods.

Error Detection and Data Integrity

Advanced error detection technologies improve communication reliability by identifying transmission errors before they affect application performance. Intelligent hardware monitoring contributes to improved network stability and consistent data delivery.

Thermal Efficiency

Efficient thermal management allows the adapter to sustain high-speed networking without excessive heat generation. Optimized cooling characteristics contribute to long-term reliability in dense rack-mounted server environments.

Compatibility Across Enterprise Platforms

Broad Operating System Support

The ConnectX-5 EN adapter supports numerous enterprise operating systems commonly deployed in modern data centers. This compatibility simplifies deployment across heterogeneous environments where Linux, Windows Server, and virtualization platforms coexist.

Integration with Modern Servers

The MCX516A-CCAT integrates with contemporary enterprise server platforms using standard PCI Express expansion slots. This simplifies upgrades while minimizing infrastructure disruption during deployment.

Flexible Network Deployment

Organizations can deploy the adapter within blade servers, rack servers, storage appliances, virtualization hosts, cloud infrastructure nodes, or high-performance computing clusters. This deployment flexibility allows businesses to standardize networking hardware across multiple infrastructure types.

Applications Across Multiple Industries

Artificial Intelligence and Machine Learning

AI and machine learning workloads require rapid movement of training datasets between compute nodes. The MCX516A-CCAT supports these environments by providing high-speed communication that accelerates distributed model training and inference operations.

Financial Services

Financial institutions require deterministic networking with extremely low latency. The ConnectX-5 EN architecture delivers the responsiveness necessary for electronic trading platforms, risk analysis, and real-time transaction processing.

Scientific Computing

Research organizations processing large simulations benefit from high-bandwidth communication between compute clusters. Efficient Ethernet networking reduces data transfer delays while supporting collaborative computational workflows.

Media and Entertainment

Video production, animation rendering, and digital content distribution generate enormous file transfers. The 100 Gigabit Ethernet capability significantly accelerates collaborative editing, rendering pipelines, and media asset management.

Enterprise Database Systems

Large databases continuously exchange information between application servers, storage platforms, analytics engines, and backup systems. High-speed networking reduces synchronization delays while improving query responsiveness and replication efficiency.

Investment Value for Modern IT Infrastructure

Future-Ready Networking

Organizations investing in the Mellanox MCX516A-CCAT ConnectX-5 EN 100-Gigabit Ethernet Adapter gain access to networking technology designed for future infrastructure growth. Increasing application demands, cloud adoption, virtualization density, and storage expansion continue driving the need for faster Ethernet connectivity, making this adapter a valuable long-term infrastructure investment.

Improved Operational Efficiency

By reducing processor overhead, accelerating packet processing, increasing bandwidth, lowering latency, and improving workload scalability, the adapter contributes to overall operational efficiency throughout enterprise environments. IT administrators benefit from improved resource utilization, simplified infrastructure management, and enhanced application performance while supporting business growth with reliable high-speed Ethernet connectivity.