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HPE 647594-B21 Ethernet 1Gb 4-Port 331T Adapter - PCIe x4 Network Card - 4 x RJ-45 - Twisted Pair - Full-height/Low-profile
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Product Features
Technical Overview
This HPE network adapter leverages PCI Express x4 host interface technology to maximize data throughput and reduce latency in demanding network applications. The quad-port design supports simultaneous connections across multiple devices or network segments, enhancing network segmentation and load distribution capabilities.
With 10/100/1000Base-T auto-negotiation, the adapter automatically detects and configures the optimal connection speed for compatible network equipment. The twisted-pair media support enables cost-effective cabling solutions with reliable data transmission up to 100 meters, making it suitable for both office and data center deployments.
Relevant factors for this section include Host Interface, Total Number of Ports, Number of Network (RJ-45) Ports, Media Type Supported. When those points are considered together, they give buyers a clearer picture of how the product is equipped, how it fits into deployment, and what kind of day-to-day role it is meant to support.
Key Product Advantages
The HPE 331T Adapter delivers multi-port network connectivity in a single expansion slot, reducing the need for multiple network cards and conserving valuable PCIe slots. Its design addresses the growing demand for network interface redundancy, virtualization support, and infrastructure consolidation in modern IT environments.
High-Density Connectivity
Four independent Gigabit Ethernet ports provide substantial network interface expansion without requiring additional hardware, ideal for servers needing multiple network segments or workstations with high bandwidth requirements.
- Conserves PCIe slots
- Reduces hardware footprint
- Simplifies cable management
Cost-Effective Deployment
Twisted-pair copper support utilizes existing cabling infrastructure, avoiding expensive fiber optic upgrades while maintaining Gigabit performance across standard network environments.
- Uses existing Cat5e/Cat6 cabling
- No specialized transceivers needed
- Lower total cost of ownership
Deployment / Use Cases
This adapter is particularly valuable in virtualization environments where multiple virtual machines require dedicated network interfaces, or in converged infrastructure deployments where network traffic needs to be segmented for storage, management, and application data.
Small to medium businesses can deploy these cards in file servers, application servers, or workstations that demand reliable Gigabit connectivity for data-intensive applications. The inclusion of both full-height and low-profile brackets ensures compatibility with standard tower servers, rack-mounted systems, and compact desktop workstations.
Server Network Expansion
Ideal for adding additional network interfaces to servers for VLAN segmentation, link aggregation, or dedicated management ports without consuming multiple expansion slots.
Workstation Connectivity
Provides high-bandwidth network access for workstations running data-intensive applications, video editing, or CAD software where network performance directly impacts productivity.
Physical Profile
The adapter features a standup form factor measuring 2.70 inches in height and 5.20 inches in width, designed to fit standard PCIe slots while providing adequate clearance for adjacent components. Both full-height and low-profile brackets are included, allowing installation in various chassis types from compact desktops to full-size servers.
The physical profile is practical for deployment planning because the dimensions and weight are clearly defined: 2.70" (68.60 mm), 5.20" (132.10 mm). This helps confirm rack, shelf, desk, or cabinet fit before installation.
- Width
- 5.20" (132.10 mm)
- Height
- 2.70" (68.60 mm)
Highlights
- Four independent Gigabit Ethernet RJ-45 ports for high-density connectivity
- PCI Express x4 host interface delivers 2000 MB/s bandwidth
- 10/100/1000Base-T auto-negotiation for optimal connection speed
- Supports standard twisted-pair copper cabling up to 100 meters
- Includes both full-height and low-profile brackets for flexible installation
- Standup form factor compatible with standard PCIe slots
- Ideal for virtualization, converged infrastructure, and server deployments
- Manufactured by Hewlett Packard Enterprise with part number 647594-B21
Specifications
| Specifications | |
|---|---|
| Manufacturer | Hewlett Packard Enterprise |
| Manufacturer Part Number | 647594-B21 |
| Brand Name | HPE |
| Product Name | Ethernet 1Gb 4-Port 331T Adapter |
| Product Type | Gigabit Ethernet Card |
| Interfaces/Ports | |
| Host Interface | PCI Express x4 |
| Total Number of Ports | 4 |
| Number of Network (RJ-45) Ports | 4 |
| Media & Performance | |
| Media Type Supported | Twisted Pair |
| Network & Communication | |
| Network Technology | 10/100/1000Base-T |
| Physical Characteristics | |
| Form Factor | Standup |
| Height | 2.70" (68.60 mm) |
| Width | 5.20" (132.10 mm) |
| Miscellaneous | |
| Country of Origin | China |
FAQ
What type of PCI Express slot does this network adapter require?
The HPE 647594-B21 adapter requires a PCI Express x4 slot. While it may physically fit in larger x8 or x16 slots, it's designed to operate at x4 electrical specifications. The card utilizes the PCIe x4 interface to deliver its full 2000 MB/s bandwidth capability for optimal network performance in compatible systems.
How many network devices can I connect to this adapter?
This adapter provides four independent RJ-45 Gigabit Ethernet ports, allowing you to connect up to four separate network devices or segments simultaneously. Each port operates independently at up to 1000 Mbps, making it suitable for connecting multiple computers, switches, or network segments through a single expansion card.
What type of network cables does this adapter support?
The adapter supports standard twisted-pair copper cables, specifically Cat5e, Cat6, or higher categories. These cost-effective cables can transmit data up to 100 meters at Gigabit speeds. The card uses 10/100/1000Base-T technology, which is compatible with existing Ethernet infrastructure without requiring specialized fiber optic cables or transceivers.
Can this adapter be installed in both servers and desktop computers?
Yes, the adapter includes both full-height and low-profile brackets, making it compatible with various system types. The full-height bracket fits standard tower servers and desktop cases, while the low-profile bracket accommodates compact systems and small form factor workstations. The standup form factor ensures proper fit in standard PCIe slots across different chassis designs.
What is the maximum data transfer rate of this network adapter?
Each port supports data transfer rates up to 1000 Mbps (1 Gigabit per second) using 10/100/1000Base-T technology. The PCI Express x4 interface provides a total bandwidth of 2000 MB/s, ensuring that the four ports can operate simultaneously without bottlenecking. The adapter auto-negotiates with connected equipment to establish the optimal speed for each connection.
Is this adapter suitable for virtualization environments?
Absolutely. The quad-port design makes this adapter ideal for virtualization deployments where multiple virtual machines require dedicated network interfaces. It allows for network segmentation, load balancing, and redundancy configurations in hypervisor environments. The high bandwidth and multiple ports support the network-intensive demands of virtualized applications and converged infrastructure solutions.
| Qty | Price | Available |
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