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665243-B21
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- HPE Ethernet 10Gb 2-port 560FLR-SFP+ Adapter
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Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.
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Every shipment is delivered directly to your address — regardless of country or carrier.
Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
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What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
Know your location’s service type.
In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
Minimal documentation required.
To initiate service, just submit the invoice and warranty card — no red tape, no waiting.
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Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.
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Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.
Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
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665243-B21 Overview
665243-B21 is a high-performance Ethernet adapter engineered for demanding networking environments. It delivers a reliable 10Gbps data rate through a robust PCIe connection interface, ensuring low latency and seamless integration for data centers, small office networks, and high-speed workstations.
Optimized for compatibility with Windows, Linux, macOS, VMware, and Hyper-V, 665243-B21 supports protocols including TCP/IP, UDP, iSCSI, NFS, and SMB. Its internal PCIe card form factor paired with an RJ-45 connector, along with features like auto-negotiation, Wake-on-LAN, Jumbo Frames, and QoS, makes it an ideal choice for high-demand enterprise and gaming setups.
What is the price of 665243-B21?
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Explore more options from Network Adapters or explore other Hpe products.
665243-B21 Specifications
| Product Type | Network Adapter |
| Adapter Type | Ethernet |
| Data Rate | 10Gbps |
| Connection Interface | PCIe |
| Supported Protocols | TCP/IP, UDP, iSCSI, NFS, SMB |
| Form Factor | Internal PCIe Card |
| Operating Temperature | 0 to 70°C |
| Storage Temperature | -40 to 85°C |
| Input Voltage | 3.3V |
| Compatibility | Windows, Linux, macOS, VMware, Hyper-V |
| Max Speed | 10Gbps |
| Supported Features | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS |
| Power Consumption | 10W |
| Connector Type | RJ-45 |
| Maximum Range | 100 meters |
| Bus Type | PCIe x4 |
| Product Name | 665243-B21 High Performance 10Gbps Ethernet Adapter |
| Height | 1.0 in |
| Width | 4.5 in |
| Depth | 0.5 in |
| Weight | 0.4 lbs |
665243-B21 Use Case
Virtualized Data Center Throughput Acceleration
Scenario: In a large enterprise data center running VMware vSphere on HPE ProLiant DL servers, IT teams install the 665243-B21-HPE Ethernet 10Gb 2-port 560FLR-SFP+ Adapter to aggregate VM traffic over dual 10Gb SFP+ links to top-of-rack switches. Benefit: Delivers up to 20 Gbps of combined bandwidth with CPU offload, reducing VM migration times by 50% and boosting consolidation ratios without network bottlenecks.
Ultralow-Latency Financial Trading Connectivity
Scenario: A stock exchange firm equips its HPE trading servers with the 665243-B21-HPE Ethernet 10Gb 2-port 560FLR-SFP+ Adapter for direct, redundant 10Gb fiber connections to market data feeds and order-matching engines. Benefit: Achieves sub-microsecond latency, ensuring faster order execution, improved price discovery and a competitive edge in high-frequency trading environments.
High-Definition Media Editing and Storage Networking
Scenario: A post-production studio integrates the 665243-B21-HPE Ethernet 10Gb 2-port 560FLR-SFP+ Adapter into HPE ProLiant storage servers to link 4K/8K video editing workstations to a centralized NAS over iSCSI. Benefit: Enables sustained 10 Gbps throughput for multi-stream 4K editing, slashing file transfer times by up to 70% and maximizing creative productivity.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| Adapter Type | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Bus Type | PCIe x1 | PCIe x4 | PCIe x4 | PCIe x4 | PCIe x4 |
| Compatibility | Windows / Linux / macOS | Windows, Linux, macOS, VMware, Hyper-V | Windows / Linux / macOS | Windows, Linux, macOS, VMware, Hyper-V | Windows, Linux, macOS |
| Connection Interface | PCIe | PCIe | PCIe | PCIe x4 | PCIe |
| Connector Type | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| Data Rate | 1Gbps | 10Gbps | 10Gbps | 10Gbps | 10Gbps |
| Depth | 1.5 inches | 0.5 in | N/A | 0.5 inches | N/A |
| Form Factor | Internal PCIe Card | Internal PCIe Card | Internal PCIe Card | Internal PCIe Card | Internal PCIe Card |
| Height | 0.2 inches | 1.0 in | N/A | 1.2 inches | N/A |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Max Speed | 1Gbps | 10Gbps | 10Gbps | 10Gbps | 10Gbps |
| Maximum Range | 100 meters | 100 meters | 100 meters | 100 meters | 100 meters |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Power Consumption | 5W | 10W | 6W | 15W | 8W |
| Product Name | QW971A Gigabit Ethernet Adapter | 665243-B21 High Performance 10Gbps Ethernet Adapter | 789006-B21 Ethernet Adapter | 684217-B21 High Performance Ethernet Adapter | 798192-B21 10Gbps Ethernet Adapter |
| Product Type | Network Adapter | Network Adapter | Network Adapter | Network Adapter | Network Adapter |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Supported Features | Auto-negotiation / Wake-on-LAN / Jumbo Frames / QoS | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation / Wake-on-LAN / Jumbo Frames / QoS | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS |
| Supported Protocols | TCP/IP / UDP | TCP/IP, UDP, iSCSI, NFS, SMB | TCP/IP / UDP | TCP/IP, UDP | TCP/IP, UDP |
| Weight | 0.5 lbs | 0.4 lbs | N/A | 1.1 lbs | N/A |
| Width | 4.5 inches | 4.5 in | N/A | 3.5 inches | N/A |
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Questions & Answers
Q
What is the HPE Ethernet 10Gb 2-port 560FLR-SFP+ Adapter (SKU: 665243-B21)?
A
The HPE 665243-B21 is a full-height, low-profile, dual-port 10 GbE network adapter with SFP+ interfaces designed for HPE ProLiant Gen9 and Gen10 servers.
Q
What are the key features of the 560FLR-SFP+ Adapter?
A
Key features include two 10 GbE SFP+ ports, hardware offloads (TCP/UDP/IP, iSCSI, FCoE), Energy Efficient Ethernet, and a low-profile FlexibleLOM form factor.
Q
Which HPE servers are compatible with SKU 665243-B21?
A
The adapter is supported on HPE ProLiant Gen9 and Gen10 rack and tower servers equipped with a FlexibleLOM slot, including DL360, DL380, ML350, and BL460 models.
Q
What types of transceivers and cables does the adapter support?
A
It supports SFP+ SR (short reach) and LR (long reach) transceivers, active and passive direct-attach copper cables, and OM3/OM4 multimode fiber.
Q
What network speeds are supported by the 560FLR-SFP+ Adapter?
A
The adapter delivers 10 GbE full-duplex performance on both ports and is backward compatible with 1 GbE when paired with compatible SFP modules.
Q
How do I install the HPE 10Gb 2-port Adapter in my server?
A
Power off the server, open the chassis, insert the adapter into the FlexibleLOM slot, secure the latch, reinstall the chassis cover, and power on the server.
Q
Does the adapter support SR-IOV and virtualization offloads?
A
Yes, it supports SR-IOV, VMware NetQueue, Microsoft VMQ, and hardware offloads for iSCSI and FCoE to optimize virtual machine performance.
Q
Which operating systems are supported by SKU 665243-B21?
A
Supported OSes include HPE-certified editions of Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware ESXi, and Citrix XenServer.
Q
What is the typical power consumption of the 10GbE adapter?
A
Under normal load, the adapter consumes approximately 5 W per port, with Energy Efficient Ethernet reducing power draw during idle periods.
Q
How do I update the firmware on the HPE 560FLR-SFP+ Adapter?
A
Download the latest NIC firmware from HPE Support, then use HPE Smart Update Manager (SUM) or Service Pack for ProLiant (SPP) to apply the update.
Q
Can I manage the adapter through HPE Integrated Lights-Out (iLO)?
A
Yes, iLO firmware provides health monitoring of the adapter ports, link status, and traffic statistics via the iLO web interface or RESTful API.
Q
Do I need an HPE Smart Array controller to use this network adapter?
A
No. The 560FLR-SFP+ is a standalone network interface card and functions independently of HPE Smart Array storage controllers.
Q
What common use cases are ideal for this adapter?
A
Use cases include high-performance virtualization, database clustering, vSAN and Hyper-Converged Infrastructure (HCI), and low-latency storage networking.
Q
What warranty coverage does SKU 665243-B21 include?
A
HPE provides a limited lifetime warranty with coverage for defects in materials and workmanship, along withWorldwide Parts Exchange service.
Q
How does the 560FLR-SFP+ Adapter differ from a standard PCIe 10GbE NIC?
A
Unlike standard PCIe NICs, this FlexibleLOM adapter integrates directly into HPE server motherboards, enabling optimal airflow and cable management.
Q
What best practices ensure maximum performance from the adapter?
A
Use HPE-qualified firmware, select correct SFP+ modules, enable offloads (TCP/IP, iSCSI), balance traffic across both ports, and monitor via iLO or network management tools.
