MCX314A-BCCT Mellanox Dual-Ports QSFP 40GBE PCI-E 3.0 x8 NIC

Overview of Mellanox MCX314A-BCCT Network Adapter

The MELLANOX MCX314A-BCCT ConnectX-3 Pro is a high-performance dual-port 40 Gigabit Ethernet QSFP+ PCI Express network adapter designed for enterprise-level data centers, cloud computing environments, and high-speed networking applications. It delivers reliable throughput, low latency, and advanced connectivity features for demanding workloads.

General Information

• Manufacturer: Mellanox
• Part Number: MCX314A-BCCT
• Product Type: Network Adapter

Technical Specifications

• Form Factor: Plug-in expansion card
• Expansion Slot Type: QSFP+
• Total QSFP Slots: 2
• PCI Express x8 Host Interface

Physical Specifications

• Height: 5.6 inches
• Width: 6.7 inches
• Low-profile bracket compatible design for flexible installation

Unsupported Interfaces

• No RJ-45 Ethernet port
• No USB connectivity
• No Serial interface
• No PoE (Power over Ethernet) support

Supported IEEE Networking Standards

• IEEE 802.3ae – 10GbE Ethernet standard support
• IEEE 802.3ba – 40/100GbE architecture
• IEEE 802.3ad – Link aggregation control protocol
• IEEE 802.3az – Energy-efficient Ethernet
• IEEE 802.1q & 802.1p – VLAN tagging and prioritization
• IEEE 802.1qau / qbg / qaz / qbb – Data center bridging enhancements

The Mellanox MCX314A-BCCT Dual-Port 40GBE Network Adapter

The Mellanox MCX314A-BCCT Dual-Port QSFP 40GbE PCI-E 3.0 x8 Network Interface Card is a high-performance enterprise-grade networking solution designed for modern data centers, cloud infrastructures, virtualization environments, and high-performance computing clusters. Built on advanced network architecture and optimized for ultra-low latency and high throughput, this network interface card delivers exceptional bandwidth efficiency through its dual-port 40 Gigabit Ethernet QSFP interfaces combined with a PCI Express 3.0 x8 host connection.

This category of high-speed NICs is widely adopted in environments where network congestion, data bottlenecks, and latency-sensitive workloads must be minimized. The Mellanox MCX314A-BCCT stands as a reliable and scalable solution for organizations demanding stable, consistent, and high-speed data transfer capabilities across distributed systems.

Advanced Dual-Port 40GbE Connectivity

The dual-port QSFP configuration of the Mellanox MCX314A-BCCT allows simultaneous 40GbE connectivity on two independent channels. This architecture significantly enhances data throughput and redundancy capabilities, ensuring continuous network availability even under heavy workloads. Each port is engineered to support high-bandwidth traffic aggregation, making it suitable for environments where data movement is continuous and intensive.

The QSFP interface ensures compatibility with high-speed optical transceivers and direct attach copper cables, enabling flexible deployment across different networking infrastructures. This adaptability is crucial in large-scale data centers where mixed cabling systems are often deployed.

PCI Express 3.0 x8 Interface Efficiency

The PCI-E 3.0 x8 interface provides a high-bandwidth connection between the network adapter and the host system. With significantly improved data transfer rates compared to previous PCI Express generations, this interface reduces bottlenecks between CPU and network hardware. The architecture is optimized to handle large packet transfers efficiently, ensuring that throughput remains stable even under peak load conditions.

By leveraging the PCIe 3.0 standard, the NIC can efficiently distribute workloads across multiple CPU cores, reducing processing overhead and improving overall system responsiveness. This makes it particularly suitable for virtualization platforms and high-density server environments.

High Throughput Data Handling

With a combined potential throughput of up to 80GbE across both ports, the Mellanox MCX314A-BCCT is engineered for environments requiring massive data flow. High-performance storage systems, backup servers, and cloud data pipelines benefit significantly from this level of bandwidth availability.

The NIC efficiently manages simultaneous data streams, ensuring balanced traffic distribution and preventing congestion. This is particularly beneficial in clustered environments where multiple nodes must exchange large volumes of data concurrently.

Advanced Offload Technologies and Hardware Acceleration

TCP/IP Offload Engine Capabilities

The Mellanox MCX314A-BCCT incorporates advanced TCP/IP offloading features that reduce CPU utilization by handling network processing tasks directly within the hardware. This includes checksum offloading, segmentation offloading, and packet classification functions.

By delegating these tasks to the NIC, server CPUs are freed to focus on application-level processing rather than network stack overhead. This improves system efficiency and allows better scalability in multi-tenant environments.

RDMA over Converged Ethernet (RoCE) Support

Remote Direct Memory Access (RDMA) over Converged Ethernet is one of the most critical technologies supported in this category of network adapters. RoCE enables direct memory-to-memory data transfers between servers without involving the CPU or operating system kernel, dramatically reducing latency.

This capability is essential for high-performance computing workloads, artificial intelligence training clusters, and distributed storage systems. It ensures that data movement occurs with minimal delay and maximum efficiency.

High-Speed Storage Access

Storage systems such as NVME over Fabrics (NVME-OF) and distributed file systems require extremely fast and reliable network connections. The MCX314A-BCCT is designed to support these environments by providing consistent low-latency communication between storage nodes and compute nodes.

This ensures that data-intensive applications such as video rendering, scientific simulations, and big data analytics can access storage resources without delay.

Thermal Management and Stability

Efficient heat dissipation mechanisms ensure stable performance even in densely packed server environments. The NIC is designed to operate within enterprise-grade thermal thresholds, preventing overheating and maintaining consistent throughput over long operational periods.

Network Protocol Optimization and Compatibility

The Mellanox MCX314A-BCCT is fully compatible with standard Ethernet networking protocols, ensuring seamless integration with existing infrastructure. It supports both Layer 2 and Layer 3 networking environments, making it suitable for diverse deployment scenarios.

This compatibility ensures that organizations can upgrade their network infrastructure without requiring extensive redesign or replacement of existing systems.

Advanced Packet Processing Capabilities

The NIC includes intelligent packet processing engines that optimize traffic flow and reduce congestion. This includes features such as adaptive routing, intelligent load balancing, and traffic prioritization based on workload requirements.

These capabilities ensure that critical applications receive prioritized bandwidth allocation, maintaining consistent performance under mixed traffic conditions.

Dual-Port Redundant 

The dual-port configuration provides built-in redundancy, allowing continuous network operation even if one port experiences failure or degradation. This ensures uninterrupted connectivity in mission-critical environments. Load balancing between ports also improves overall bandwidth utilization and network stability.

Security Features and Data Protection

Secure Data Transmission

The Mellanox MCX314A-BCCT includes security mechanisms that ensure safe data transmission across network channels. Encryption support and secure communication protocols help protect sensitive data in enterprise environments.

This is particularly important in industries such as finance, healthcare, and government infrastructure where data protection is critical.