647594-B21 HPE Ethernet 1GB 4-Port 331T PCI-E Network Adapter

HPE 647594-B21 Ethernet PCI-E Network Adapter Overview

The HPE 647594-B21 Ethernet 1GB 4-Port 331T PCI-E Plug-in Card is a high-performance networking solution designed for enterprise servers, delivering reliable multi-port Gigabit connectivity. Built by Hewlett Packard Enterprise (HPE), this adapter enhances server communication efficiency, scalability, and stable data transfer across complex IT infrastructures.

General Product Information

• Manufacturer: HPE (Hewlett Packard Enterprise)
• Part Number: 647594-B21
• Product Type: Ethernet Network Adapter

Technical Specifications

• Device Type: 4-Port Ethernet Network Interface Card (NIC)
• Form Factor: Low-profile Plug-in Card
• Interface Type: PCI Express 2.0 x4
• PCI Standard: PCIe 2.0 compliant

Integrated Processor

• Controller: Broadcom BCM5719 chipset
• Processing Unit: 1 × BCM5719 Ethernet controller

Network Performance Capabilities

• Connectivity Type: Wired Ethernet
• Supported Speeds: 10/100/1000 Mbps (Gigabit Ethernet)
• Maximum Data Rate: Up to 1 Gbps per port

Supported Protocols

• Ethernet (10BASE-T)
• Fast Ethernet (100BASE-TX)
• Gigabit Ethernet (1000BASE-T)

RJ-45 Connectivity

• Total Ports: 4 × RJ-45 Ethernet ports
• Port Type: 10BASE-T / 100BASE-TX / 1000BASE-T compatible

Expansion Slot Compatibility

• Compatible Slot: PCI Express 2.0 x4
• Designed for server motherboard integration
• Supports low-profile chassis installation

Operational Efficiency

• Improves server network throughput
• Reduces latency in data transmission
• Enhances multi-tasking in enterprise systems

Reliability and Stability

• Enterprise-grade Broadcom chipset reliability
• Stable performance under heavy workloads
• Optimized for continuous 24/7 operation

Scalability Benefits

• Supports multiple network connections simultaneously
• Ideal for virtualization and cloud environments
• Expandable integration into existing server setups

Data Centers

• High-density server environments
• Load balancing and traffic distribution

Business IT Infrastructure

• Corporate networks requiring multi-port redundancy
• Internal communication optimization

Virtualization Systems

• Supports virtual machine networking
• Improves bandwidth allocation efficiency

Compact Low-Profile Design

• Space-saving form factor
• Compatible with rack-mounted servers
• Easy installation in constrained environments

Installation Flexibility

• Plug-and-play PCIe integration
• Compatible with major server platforms
• Minimal configuration requirements

HPE 647594-B21 Ethernet Network Adapter Overview

The HPE 647594-B21 Ethernet 1GB 4-Port 331T PCI-E Plug-in Card Network Adapter is designed to deliver high-density, reliable, and scalable network connectivity for enterprise server environments. Built for modern data centers, virtualization platforms, and mission-critical workloads, this adapter integrates four independent Gigabit Ethernet ports into a single PCI Express card form factor, reducing slot consumption while maximizing throughput efficiency. It is widely deployed in rack-mounted servers, blade systems, and cloud infrastructure nodes where stable multi-port connectivity is essential for load balancing, redundancy, and segmented traffic management.

This network adapter is engineered to support demanding workloads that require simultaneous data streams, such as database replication, virtualization traffic distribution, storage network segmentation, and clustered application environments. By combining multiple ports into a single interface card, it reduces hardware complexity while improving scalability across server fleets.

Optimized Design for Server Integration

The PCI-E architecture of the HPE 331T 4-port adapter ensures seamless compatibility with HPE ProLiant servers and other enterprise-grade systems that support standard PCI Express slots. Its plug-in design allows IT administrators to upgrade or expand network capabilities without extensive system redesign or downtime. This makes it a preferred solution for organizations transitioning from single-port adapters to multi-port high-density networking configurations.

High-Speed 1GbE Connectivity for Modern Infrastructure

Each of the four ports on the adapter supports 1 Gigabit per second Ethernet speed, providing aggregated bandwidth potential that significantly enhances network performance in multi-threaded and distributed computing environments. This capability is particularly beneficial for virtualization hosts running multiple virtual machines that require dedicated network channels to maintain isolation and performance stability.

The adapter ensures consistent throughput even under heavy traffic conditions by efficiently distributing workloads across its multiple ports. This reduces bottlenecks and improves response times in environments where simultaneous data access and transmission are critical.

Load Distribution and Traffic Optimization

The HPE 331T 4-Port adapter is engineered to support intelligent traffic distribution mechanisms that enhance overall network efficiency. By distributing incoming and outgoing data across multiple interfaces, it helps maintain balanced network utilization. This ensures that no single port becomes a performance choke point, improving system stability and responsiveness in high-demand server deployments.

Reduced Latency in Virtualized Environments

Virtualization platforms benefit significantly from the adapter’s multi-port architecture. Each virtual machine can be assigned dedicated or shared network channels, reducing contention and minimizing latency spikes. This improves application responsiveness, especially for workloads such as web hosting, ERP systems, and database applications running in virtual environments.

Robust Build Quality for Continuous Operation

The HPE 647594-B21 Ethernet adapter is built for continuous 24/7 operation in enterprise environments where downtime is not acceptable. It is constructed using high-quality components that ensure durability under sustained load conditions and variable thermal environments commonly found in server racks and data centers.

Its hardware design incorporates enterprise-grade controllers that are optimized for stable packet processing, error reduction, and consistent data delivery across all four ports. This ensures reliable communication between servers, storage systems, and network infrastructure components.

Thermal Efficiency and Power Management

Efficient thermal management is a key aspect of the adapter’s design. It is optimized to operate within standard server airflow systems, ensuring that heat dissipation is managed without requiring additional cooling resources. Power consumption is balanced to maintain performance while reducing overall energy usage in large-scale deployments.

Multi-Port Architecture for Scalable Network Design

One of the primary advantages of the HPE 331T 4-port Ethernet adapter is its ability to support scalable network architectures. By providing multiple interfaces in a single card, it enables IT teams to expand network capacity without increasing hardware footprint. This is especially valuable in densely populated server environments where PCI-E slot availability is limited.

The adapter simplifies infrastructure planning by reducing the number of separate network cards required per server. This consolidation improves airflow, reduces cable clutter, and streamlines maintenance operations within data centers.

Efficient Rack-Level Deployment

In rack-based deployments, the adapter helps optimize port utilization across multiple servers. This ensures that each node in a server cluster can maintain consistent connectivity without requiring additional expansion hardware. It is commonly used in environments that require high availability and failover support.

Compatibility and System Integration

The HPE 647594-B21 adapter is specifically engineered for compatibility with HPE server platforms, ensuring seamless integration with ProLiant systems and other enterprise hardware solutions. This tight integration reduces configuration complexity and ensures optimal driver support and firmware compatibility.

Its PCI-E interface allows it to function within a wide range of server generations, making it a flexible upgrade option for organizations modernizing their infrastructure without replacing entire systems.

Driver and Firmware Optimization

The adapter is supported by optimized drivers that ensure stable communication between hardware and operating systems. These drivers enhance performance, improve error handling, and provide advanced configuration options for network administrators managing complex enterprise environments.

Enhanced Virtual Machine Networking Performance

The HPE 331T 4-port adapter is particularly effective in virtualization environments where multiple virtual machines share physical network resources. Each port can be assigned to different virtual switches or network interfaces, enabling efficient traffic segmentation and improved performance isolation between workloads.

This reduces network contention and ensures that critical applications maintain consistent bandwidth availability, even during peak usage periods.

Network Reliability

The multi-port design of the HPE 647594-B21 Ethernet adapter enables network redundancy configurations that enhance system availability. In the event of a port failure or network disruption, traffic can be rerouted through alternate interfaces, minimizing downtime and maintaining operational continuity.

This redundancy is critical in enterprise environments where uninterrupted network access is essential for business continuity and service delivery.

Fault Tolerance in Critical Systems

The adapter supports fault-tolerant configurations that ensure stable performance even under adverse conditions. This includes automatic recovery mechanisms that detect and respond to network issues in real time, maintaining consistent connectivity across all active ports.

Enterprise Data Centers and Cloud Platforms

The adapter is widely used in enterprise data centers where high-density networking is required. Its multi-port configuration supports complex routing, virtualization, and storage networking tasks, making it ideal for cloud computing environments and large-scale IT infrastructures.

It is also commonly deployed in hybrid cloud systems where on-premise infrastructure integrates with external cloud services.

Strategic Role in Modern IT

The HPE 647594-B21 Ethernet 1GB 4-Port 331T PCI-E Plug-in Card Network Adapter plays a strategic role in modern IT infrastructure by enabling scalable, redundant, and high-performance networking capabilities. Its integration into server environments supports long-term infrastructure growth and operational efficiency.