How many network interfaces does it provide?

The adapter is listed with 4 network interfaces and is described as a quad-port 1GbE RJ-45 server network adapter. For buyers, the confirmed port count is the most important capacity detail in the supplied data, because it defines how many Ethernet connections the card can present.

What interface class does it use?

The product is categorized as a PCIe 2.0 4-port 1Gb Ethernet adapter. The only confirmed host interface information in the supplied data is PCIe 2.0, so that is the correct specification to use when checking server slot compatibility.

What Ethernet speed class is specified?

The supplied data states that this is a 1Gb Ethernet adapter. That is the only confirmed speed class available in the product information, so no additional per-port or aggregate bandwidth claims should be added beyond the 1Gb Ethernet designation.

Is this adapter intended for servers?

Yes. The provided category and product description identify it as a quad-port 1GbE RJ-45 server network adapter. The source data also places it in a PCIe 2.0 4-port 1Gb Ethernet adapter category, which confirms its server-networking use case.

647593-B21 - HPE 647593-B21 4-port 1Gb Ethernet Adapter

Name: HPE 647593-B21 4-port 1Gb Ethernet Adapter
Brand: HPE
SKU: 647593-B21
Price: 68 USD
Availability: InStock

647593-B21 - HPE 647593-B21 4-port 1Gb Ethernet Adapter | US IT Hardware

Product overview

The HPE Ethernet 1Gb 4-port 331T Adapter, SKU 647593-B21, is a quad-port PCIe 2.0 1Gb Ethernet adapter. It provides four network interfaces and is designed for server connectivity in HPE ProLiant environments. The adapter is identified in product data as a quad-port 1GbE RJ-45 server network adapter. Available research also describes the 331T as a 4-port 1Gb/s PCIe 2.0 x4 network adapter. Based on the provided specifications, the confirmed technical points are the HPE brand, the 331T model, the 4-port Ethernet design, and the PCIe 2.0 interface class. No additional port speed, bracket, power, or physical dimensions are stated in the source specifications, so they are omitted here.

4-port Ethernet adapter
PCIe 2.0 interface
1Gb Ethernet class
Quad-port server network adapter
RJ-45 server adapter
HPE 331T model

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Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	647593-B21
Brand	HPE
Condition	Refurbished
Model	Ethernet 1Gb 4-port 331T Adapter
Power	Typical 1.0 W, Maximum 4.3 W
Wiring	Category 5 or better twisted-pair cabling
Bus Type	PCI Express 2.0 x4
Features	Jumbo Frames support, Large Send Offload, PXE support
Data Path	Four lane x4 PCI Express compatible with x4, x8, and x16 PCI Express slots
Processor	1 x Broadcom BCM5719
Form Factor	Plug-in card, low profile

Best for

Server networking
Suitable for server connectivity where a quad-port 1Gb Ethernet adapter is required. The provided data identifies it as a 4-port 1GbE RJ-45 server network adapter.
Multi-port connectivity
Useful when four Ethernet interfaces are needed on one adapter. The source data confirms 4 network interfaces and a quad-port design.
PCIe-based deployment
Fits environments that specify a PCIe 2.0 network adapter. The product is listed as a PCIe 2.0 4-port 1Gb Ethernet adapter.

Frequently asked questions

What is the exact product identifier?

The provided product data identifies this adapter as the HPE Ethernet 1Gb 4-port 331T Adapter with SKU 647593-B21. Using both the model name and SKU helps procurement teams match the correct item to internal catalogs and avoid confusion with other 331T variants.

Details

Shipping, warranty & returns

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Cabling Type	Ethernet 10Base-T; Ethernet 100Base-TX; Ethernet 1000Base-T

Product Line	HPE 331T

Product Type	Network adapter

Maximum Power	4.3 W

Cable Distance	Up to 328 ft

On-board Memory	4 Mbit

Processor Brand	Broadcom

Compatible Slots	1 x PCI Express 2.0 x4

Interrupt Levels	Automatically configured

Processor Number	BCM5719

Status Indicators	Link/activity, Port transmission speed

AUX Power with WoL	1.0 W

Compatible Servers	HPE ProLiant servers

Compliant Standards	IEEE 802.1as, IEEE 802.1Q, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3az, IEEE 802.3u, IEEE 802.3x

Data Link Protocols	Ethernet, Fast Ethernet, Gigabit Ethernet

Interfaces Provided	4 x 1000Base-T RJ-45

Included Accessories	Low-profile bracket, full-height bracket

Processors Installed	1

Typical Power with WoL	1.0 W

Connectivity Technology	Wired

Compatible Slots Required	1 x PCI Express 2.0 x4

PCI Specification Revision	PCIe 2.0

Compatible Operating Systems	Microsoft Windows Server 2008, HPC Server 2008, Microsoft Windows 2008, Red Hat Enterprise Linux 5.7, Red Hat Enterprise Linux 6.1, SLES 10, SLES 11, Oracle Solaris 10, VMware ESX, VMware ESXi, Microsoft Windows Hyper-V

Power Requirement at Maximum Traffic	4.3 W

Data Transfer Rate	1 Gbit/s per port
Aggregate Full Duplex Bandwidth	8 Gbps

Networking Ports & Interfaces

Ports	4 x RJ-45
Port Speed	10/100/1000 Mb/s
Port Quantity	4
Connector Type	Base-T
Host Interface	PCI Express 2.0 x4
Connector Count	Four
Network Interface	Gigabit Ethernet
Network Processor	Broadcom BCM5719
Line Rate per Port	2,000 Mbps full duplex
Protocol Supported	802.3, 802.3ab, 802.3u, 802.3x, Dynamic 802.3ad, 802.1Q, 802.3az, 1588, 802.1as
Network and Adapter Ports	10/100/1000

HPE 647593-B21 4-port 1Gb Ethernet Adapter