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10/25Gb adapter delivered high throughput.
817750-B21
HPE Eth 10/25Gb2p 640FLR-SFP28 FIO Adptr
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817750-B21
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- HPE Eth 10/25Gb2p 640FLR-SFP28 FIO Adptr
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817750-B21 Overview
817750-B21 is a high-performance Ethernet adapter designed as an internal PCIe card, delivering reliable 1Gbps data rates for efficient network connectivity. It supports key protocols such as TCP/IP and UDP, making it well-suited for small office networks, high-speed workstations, and data centers where robust and stable connections are a necessity.
The 817750-B21 adapter offers advanced features including auto-negotiation, Wake-on-LAN, Jumbo Frames, and QoS support to optimize network performance. With compatibility across Windows, Linux, macOS, VMware, and Hyper-V environments, this Ethernet adapter ensures seamless integration into various network infrastructures while maintaining optimal power consumption, operating, and storage temperature specifications.
817750-B21 price is $249.27, a 44% saving from the Hpe list price of $445.12. 817750-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 817750-B21 for additional pricing. Browse the full Hpe Network Adapters series or explore all Hpe products.
817750-B21 Specifications
- Product Type
- Network Adapter
- Adapter Type
- Ethernet
- Data Rate
- 1Gbps
- Connection Interface
- PCIe
- Supported Protocols
- TCP/IP, UDP
- 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
- 1Gbps
- Supported Features
- Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS
- Power Consumption
- 5W
- Connector Type
- RJ-45
- Maximum Range
- 100 meters
- Bus Type
- PCIe x1
- Product Name
- 817750-B21 Ethernet Adapter
- Height
- 1.2 inches
- Width
- 3.0 inches
- Depth
- 0.9 inches
- Weight
- 0.2 lbs
817750-B21 Use Case
Enterprise Server Virtualization with 817750-B21 HPE Eth 10/25Gb2p 640FLR-SFP28 FIO Adapter
In a high-density VMware or Hyper-V cluster, IT architects deploy the 817750-B21 HPE Eth 10/25Gb2p 640FLR-SFP28 FIO Adptr to deliver dual 10/25Gb ports directly into blade and rack servers. This configuration: • Eliminates network bottlenecks for dozens of VMs per host • Scales VM-to-VM east-west traffic by up to 2.5× • Reduces per-VM networking costs through port consolidation Outcome: Dramatically improved VM density, predictable low latency, and up to 30% TCO savings.
High-Performance Computing & Big Data Analytics Acceleration
Research labs and data warehouses integrate the 817750-B21 HPE Eth 10/25Gb2p 640FLR-SFP28 FIO Adptr into compute nodes feeding HPE 3PAR or Nimble storage arrays via 25GbE fabric. This setup: • Boosts parallel data ingestion rates by 40% • Lowers map-reduce job completion times by 25% • Enables seamless RDMA over Converged Ethernet (RoCE) for HPC messaging Outcome: Fast-track scientific simulations and real-time analytics with sustained multi-Gb throughput and sub-10 µs latencies.
Multi-Tenant Cloud & Service Provider Networking
Cloud providers and telco edge environments leverage the 817750-B21 HPE Eth 10/25Gb2p 640FLR-SFP28 FIO Adptr for secure, flexible tenant isolation across shared spine-leaf topologies. Key benefits include: • Dedicated 25Gb bandwidth slices per tenant • Hardware-offloaded VXLAN & NVGRE overlay support • 99.999% SLA-grade resilience with hot-swap FLR form-factor Outcome: Simplified provisioning, granular QoS control, and guaranteed performance SLAs for diverse tenants on a single, converged fabric.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 817750-B21 |  879383-B21 |  718904-B21 |  817746-B21 |  TC352A | |
|---|---|---|---|---|---|
| Product Type | Network Adapter | Network Adapter | Network Adapter | Network Adapter | Network Adapter |
| Adapter Type | Ethernet | Ethernet | Ethernet | Ethernet | Ethernet |
| Data Rate | 1Gbps | 10Gbps | 1Gbps | 10Gbps | 10Gbps |
| Connection Interface | PCIe | PCIe | PCIe | PCIe | PCIe |
| Supported Protocols | TCP/IP, UDP | TCP/IP / UDP / iSCSI | TCP/IP, UDP | TCP/IP, UDP | TCP/IP, UDP, iSCSI, NFS |
| Form Factor | Internal PCIe Card | Internal PCIe Card | Internal PCIe Card | Internal PCIe Card | Internal PCIe Card |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Windows, Linux, macOS, VMware, Hyper-V | Windows / Linux / macOS | Windows, Linux, macOS | Windows, Linux, macOS | Windows, Linux, macOS |
| Max Speed | 1Gbps | 10Gbps | 1Gbps | 10Gbps | 10Gbps |
| 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 | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS |
| Power Consumption | 5W | 6W | 3.5W | 5W | 10W |
| Connector Type | RJ-45 | RJ-45 | RJ-45 | RJ-45 | RJ-45 |
| Maximum Range | 100 meters | 100 meters | 100 meters | 100 meters | 100 meters |
| Bus Type | PCIe x1 | PCIe x4 | PCIe x1 | PCIe x4 | PCIe x4 |
| Product Name | 817750-B21 Ethernet Adapter | 879383-B21 High-Performance Ethernet Adapter | 718904-B21 Gigabit Ethernet Adapter | 817746-B21 High Performance Ethernet Adapter | TC352A Network Adapter |
| Height | 1.2 inches | 0.7 inches | 0.4 inches | 0.7 inches | 0.5 inches |
| Width | 3.0 inches | 3.0 inches | 4.3 inches | 3.5 inches | 4.4 inches |
| Depth | 0.9 inches | 0.5 inches | 1.5 inches | 1.5 inches | 1.5 inches |
| Weight | 0.2 lbs | 0.3 lbs | 0.2 lbs | 0.5 lbs | 0.3 lbs |
Reviews & Ratings
O
Owais Siddiq
4
OEM adapter installed cleanly.
J
Jonas Berg
5
Low latency performance.
C
Chris Young
5
Great network upgrade.
L
Luis Moreno
5
Dependable enterprise NIC.
Questions & Answers
What is the HPE Eth 10/25Gb2p 640FLR-SFP28 FIO Adapter (SKU 817750-B21) and what does it do?
The HPE 817750-B21 is a dual-port 10/25 Gb FlexLOM network adapter for HPE ProLiant servers. It delivers high-throughput, low-latency Ethernet connectivity optimized for virtualization and storage-intensive workloads.
Which HPE servers support the 817750-B21 FlexLOM adapter?
The 817750-B21 is supported on HPE ProLiant Gen10 and Gen11 servers with a FlexLOM slot, including DL380, DL360, ML350 and compatible rack and tower models. Refer to HPE QuickSpecs for full compatibility details.
What are the primary performance features of the 10/25 Gb 2-port adapter?
It provides up to 25 Gbps per port, advanced congestion management, SR-IOV, low CPU overhead and hardware offloads. These features accelerate virtualized and cloud workloads with enhanced Quality of Service (QoS).
Which SFP28 transceivers are compatible with the 817750-B21?
Compatible optics include HPE SFP28 25 GbE SR, LR and 10 GbE SFP+ SR, LR transceivers. Always use HPE-certified modules to ensure interoperability, optimal performance and warranty compliance.
How do I install the HPE 817750-B21 FlexLOM adapter?
Power down the server, remove the access panel, align the FlexLOM adapter in the slot, press until it locks, reinstall the panel and power on. Then install the latest HPE network driver from HPE Support Center.
What cabling should I use with the 817750-B21 for 25 Gb performance?
Use OM3 or OM4 multimode fiber with LC-LC SFP28 patch cables for 25 Gb links. For long-reach applications, select single-mode fiber with matching LR transceivers to achieve up to 10 km reach.
What is the maximum throughput per port on this adapter?
Each port supports up to 25 Gbps full duplex, delivering 50 Gbps aggregate bandwidth. It automatically negotiates 10 Gbps and 25 Gbps based on network link conditions and transceiver capabilities.
Does the 817750-B21 support RDMA and iWARP technologies?
Yes. The adapter supports RDMA over Converged Ethernet (RoCE) and iWARP, reducing CPU utilization and latency for high-performance computing, storage and database applications.
Is the adapter compatible with VMware ESXi, Microsoft Hyper-V and Linux distributions?
The HPE 817750-B21 is certified for VMware ESXi 6.x/7.x, Microsoft Hyper-V and major Linux distributions (Red Hat, SUSE, CentOS). Download validated drivers from HPE Support Center for your OS version.
What are the power and thermal specifications of the 817750-B21?
Typical power consumption is 5.5 W per port in 10 Gb mode and 7.2 W per port in 25 Gb mode. It operates between 0 °C and 55 °C; follow HPE thermal guidelines for proper airflow.
How does this adapter improve data center network efficiency?
With hardware offloads, packet acceleration and QoS, the adapter reduces CPU cycles, lowers latency and optimizes bandwidth utilization, boosting virtualization density and overall network throughput.
Can I use the 817750-B21 in non-HPE servers?
No. The 817750-B21 FlexLOM adapter is specifically designed for HPE server FlexLOM slots and is unsupported in non-HPE systems. For third-party servers, use compatible PCIe network adapters.
What warranty and support services are available for SKU 817750-B21?
The adapter includes a standard HPE one-year limited warranty. Extended coverage and HPE Foundation Care are available for faster response and on-site support through HPE Enterprise Support plans.
How do I update the firmware of the 817750-B21 adapter?
Download the latest firmware from HPE Support Center via the Service Pack for ProLiant (SPP) or the NIC firmware bundle. Use HPE Smart Update Manager (SUM) to apply updates during scheduled maintenance.
What distinguishes the 640FLR-SFP28 FlexLOM from a standard network LOM?
FlexLOM is hot-pluggable and independently upgradable without impacting server backplanes. The 640FLR-SFP28 delivers two 10/25 Gb ports with SFP28 support for advanced networking flexibility.
What switch connectivity options does the adapter support?
It connects to 10 Gb/25 Gb Ethernet switches with SFP28 or SFP+ ports. The adapter supports link aggregation (LACP), VLAN tagging and jumbo frames up to 9216 bytes for scalable network designs.
Where can I purchase a genuine HPE 817750-B21 adapter?
Buy through authorized HPE channel partners, HPE’s online store or certified resellers. Verify SKU 817750-B21 and request HPE authentication to ensure genuine parts and full warranty coverage.