What type of network connectivity does the HPE 716591-B21 adapter provide?

The HPE 716591-B21 is the HP Ethernet 10Gb 2-port 561T Adapter, classified as a PCIe 2.1 10GBASE-T Ethernet adapter. It offers dual-port 10GbE connectivity using RJ-45 interfaces, enabling 10 Gigabit Ethernet links over copper cabling within enterprise server environments.

How many network ports are available on the HP Ethernet 10Gb 2-port 561T Adapter?

This adapter provides two network ports. It is described as a dual-port 10GbE RJ-45 561T standup adapter, giving servers two separate 10 Gigabit Ethernet interfaces on a single PCIe 2.1 card for redundancy, traffic separation, or increased aggregate capacity.

Which interface standard does the HPE 716591-B21 network adapter use?

The HPE 716591-B21 belongs to the PCIe 2.1 10GBASE-T Ethernet adapter category. This means it is designed to fit standard PCI Express 2.1 slots in compatible servers, allowing enterprises to use it in systems that support this PCIe generation for 10GbE connectivity.

What is the product category of the HP Ethernet 10Gb 2-port 561T Adapter?

The adapter is categorized as a network adapter, specifically a PCIe 2.1 10GBASE-T Ethernet Adapter and a dual-port 10GbE RJ-45 561T standup adapter. This classification indicates its role as a server network interface card with two 10GbE copper ports.

Is the HP Ethernet 10Gb 2-port 561T Adapter suitable for enterprise deployments?

Yes, the product is explicitly described with an enterprise product level. As an HP Ethernet 10Gb 2-port 561T standup adapter with dual 10GbE RJ-45 ports and PCIe 2.1 connectivity, it is designed for professional IT and data center environments that require standardized 10GBASE-T Ethernet adapters.

716591-B21 - HPE 716591-B21 10Gb 2-port 561T network adapter

Name: HPE 716591-B21 10Gb 2-port 561T network adapter
Brand: HPE
SKU: 716591-B21
Price: 98 USD
Availability: InStock

716591-B21 - HPE 716591-B21 10Gb 2-port 561T network adapter | US IT Hardware

Product overview

The HPE HP Ethernet 10Gb 2-port 561T Adapter 716591-B21 is an enterprise network adapter designed for demanding data center and server environments. This dual-port 10GbE RJ-45 standup adapter provides 10GBASE-T Ethernet connectivity over copper, helping standardize on twisted-pair infrastructure across the rack. Built on a PCIe 2.1 interface, it is suitable for modern server platforms that require higher throughput than legacy 1GbE solutions. The 561T adapter targets enterprise deployments that need consistent 10 Gigabit performance across two network ports on a single PCIe card. Its design supports consolidation of network links, helping reduce slot usage while enabling high-bandwidth connectivity for virtualization, storage, and application traffic. As part of HPE’s enterprise portfolio, the 716591-B21 is positioned for use in professional IT environments where reliable 10GbE connectivity and dual-port configurations are essential for redundant and segmented network designs.

Dual-port 10GbE RJ-45 561T standup adapter
PCIe 2.1 10GBASE-T Ethernet connectivity
Enterprise HP Ethernet 10Gb 2-port design
Supports two 10 Gigabit Ethernet connections
Copper-based 10GBASE-T server networking
HPE SKU 716591-B21 for standardized builds

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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 #	716591-B21
Brand	HPE
Condition	Refurbished
Model	HP Ethernet 10Gb 2-port 561T Adapter
Series	561T
Bus Type	PCIe v2.1 (Gen 2) x8
Part Class	Option Part Number
Technology	Ethernet 10Gb 2-port 561T adapter
Form Factor	Standard and low profile standup adapter
PXE Support	PXE boot support
Bracket Type	Full-height and half-height brackets

Compatible systems

HP Ethernet 10Gb 2-port 561T Adapter 716591-B21 is a PCIe 2.1 x8 10GBASE-T NIC for HPE ProLiant Gen8 servers with Windows, Linux and Solaris support.

HPE ProLiant
Model: ProLiant Gen8 rack servers
Form factor: Rack
Generation: Gen8
QuickSpecs states PCIe 2.1 form factor designed for HP ProLiant Gen8 rack servers; option part 716591-B21.
HPE ProLiant
Model: ProLiant Gen8 tower servers
Form factor: Tower
Generation: Gen8
QuickSpecs states PCIe 2.1 form factor designed for HP ProLiant Gen8 tower servers; option part 716591-B21.

Best for

Virtualization hosts
Dual 10GbE RJ-45 ports and 10GBASE-T connectivity over PCIe 2.1 make this adapter suitable for virtualized servers that require higher bandwidth than 1GbE and multiple network segments on a single card.
Data center servers
As a PCIe 2.1 dual-port 10GbE standup adapter, the 561T is appropriate for enterprise and data center servers that need 10GBASE-T links using copper cabling for core application and service traffic.
LAN aggregation and uplinks
With two 10GbE RJ-45 ports, this adapter can be used to provide higher capacity uplinks from servers into aggregation or core switches using 10GBASE-T infrastructure.

Details

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Product Line	HPE Server Networking Options

Product Type	Network adapter

VLAN Support	Supports VLAN tagging

Jumbo Frame Support	Supports jumbo frames

Cable Type Supported	CAT 6A UTP or better

Receive Side Scaling	Supports Receive Side Scaling (RSS)

Maximum Cable Distance	100 m with CAT 6A cabling or better

Auto-negotiation Speeds	100 Mbps; 1 Gbps; 10 Gbps on both ports

Virtualization Features	VMware NetQueue; Microsoft VMQ

Operating System Support	Microsoft Windows Server 2008; Windows HPC Server 2008; RHEL 5.7/5.8/5.9; RHEL 6.1/6.2/6.3; SLES 10 SP4; SLES 11 SP2; Solaris 10; Solaris 11

Supported Server Platforms	HP ProLiant Gen8 rack and tower servers

Performance

Aggregate Bandwidth	40 Gbps aggregate full duplex theoretical bandwidth
Media Type Supported	Twisted Pair
Maximum Data Transfer Rate	80 Gbit/s
Theoretical Ethernet Transfer Rate	20 Gbps full duplex Ethernet transfer rate per port

Power Consumption	19 W maximum

Networking Ports & Interfaces

Ports	2 x 10Gb Ethernet RJ-45 ports
NIC Teaming	Supports NIC teaming (bonding)
Data Link Protocol	10 Gigabit LAN
Network Controller	Intel X540
Network Technology	10GBase-T; 10 Gigabit Ethernet
Per Port Data Rate	20 Gbps full duplex per port
Interface (bus) Type	PCI Express 2.1 x8
Host Interface Standard	PCIe standard compliant adapter
Number of Network (RJ-45) Ports	2

HPE 716591-B21 10Gb 2-port 561T network adapter