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HPE P05891-B21 G3 2-Port 40GbE QSFP Network Adapter View larger
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HPE P05891-B21 G3 2-Port 40GbE QSFP Network Adapter

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Refurbished dual-port 40 GbE QSFP+ NIC for high-speed connectivity.
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Detailed Specifications

HPE P05891-B21 

G3 2-Port 40GbE QSFP+ Network Adapter

The HPE P05891-B21 G3 2-Port 40GbE QSFP+ Network Adapter is a high-speed PCIe network card tailored for enterprise and data center environments where throughput and low latency are paramount. With two QSFP+ ports delivering aggregate 40 Gbps connectivity each, this adapter enables rapid, reliable data transfer between servers, storage systems, and high-performance network fabrics. Ideal for system administrators, IT architects, and virtualization specialists, the P05891-B21 offers immediate bandwidth expansion in HPE ProLiant platforms. Its G3 designation denotes advanced firmware and compatibility enhancements, ensuring seamless integration and extending infrastructure longevity. Featuring a refined form factor and mature support, this adapter delivers enterprise-grade connectivity at a compelling price point—especially when refurbished.

Features

In modern data centers and virtualization-heavy environments, the demand for robust, low-latency networking continues to surge. The HPE P05891-B21 caters to these needs by delivering dual 40GbE capability via QSFP+ ports and leveraging a PCIe x8 (3.0) interface for efficient data transfer pathways . As a refurbished option, each unit is professionally tested to deliver reliable performance while offering significant cost savings compared to new hardware. Deployed within HPE ProLiant or Apollo server platforms, or as part of network backbones and virtualization clusters, this adapter supports management protocols like Web, SNMP, and Telnet—streamlining integration with existing orchestration tools Whether powering RDMA over Converged Ethernet (RoCE), high-speed storage links, or dense compute fabrics, the P05891-B21 simplifies upward scaling with minimal disruption and proven network resilience.

Advanced Options

Designed for demanding workloads, the HPE P05891-B21 adapter delivers consistent high-throughput and low-latency performance essential for enterprise-class environments. Dual QSFP+ ports offer flexible connectivity—supporting breakout scenarios or redundant link configurations. The PCIe 3.0 x8 interface ensures full-bandwidth utilization, maintaining consistent transfer rates even under peak network traffic. Its compatibility with Web, SNMP, and Telnet simplifies management and integration into network monitoring frameworks 

Product Key Features

  • Dual QSFP+ ports delivering 40 Gbps each

  • PCIe (x8) interface (Gen 3 connectivity)

  • Supports 40GBase-X over optical fiber

  • Refurbished with 90-day warranty

  • Simple management via Web, SNMP, and Telnet

  • Compatible with HPE ProLiant and Apollo systems

Reliability & Performance

. As a G3 generation model, the adapter includes firmware and driver enhancements for improved compatibility and reliability. Refurbished units undergo testing to meet functional standards, and are backed by a 90-day warranty—providing enterprise-level performance at a reduced cost. For long-range, high-speed optical interconnections, this card supports 40GBase-X modules, making it suitable for agile, scalable network architectures. Overall, the P05891-B21 balances affordability with performance, offering a smart upgrade path for modern data center deployments.

Key Features :

    • Dual QSFP+ ports (40 Gbps each)

    • PCIe Gen 3 x8 interface

    • Optical fiber, 40GBase-X support

    • Refurbished with 90-day warranty

    • Managed via Web, SNMP, Telnet

    • Compatible with HPE ProLiant & Apollo servers

SpecificationDetails
Model Number P05891-B21 (G3 2-Port 40GbE QSFP+ Network Adapter
Type PCIe Network Interface Card
Capacity / Speed 2× 40 GbE (total 80 Gbps)
Form Factor PCIe plug-in card (x8 compatible)
Interface 2× QSFP+ ports, optical fiber support
Media Type 40GBase-X (optical fiber)
Management Protocols Web interface, SNMP, Telnet
Condition Refurbished (typically)
Warranty 90 Days (vendor-dependent)
Output Voltage 208–230 V AC
Standards Compliance QSFP+ MSA, 40GBase-X IEEE standards

  • All packages are shipped same day if the order is placed before 3PM CST

    We use UPS/FedEx to ship the packages with different service levels offered by UPS/FedEx

    Overnight Shipping take 1 business day
    Expedited Shipping take about 2-3 business days
    Ground shipping take about 3-5 business days

    You can select the desired service level at Checkout and we will make sure the package is shipped as per the selected service level.

  • We Accept

    i) PayPal
    ii) All Credit & Debit Cards
    iii) Purchase Orders
    iv) Check
    v) Bank Transfer/ACH/Wire Transfer

    To process the order through Paypal/CC, you can simply checkout and process the payment.

    If you want to issue us Purchase Order/Check/Bank Transfer, Please contact us at the following details

    Call: 469.458.9636
    Email: sales@dcsupplies.net

  • If you have any queries, please contact us at the following details and we will be happy to help

    Call
    469.458.9636
    469.458.9638

    Email
    sales@dcsupplies.net

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