HPE 640SFP28 2-Port 10/25GbE Network Adapter 817753-B21

BRAND NEW. FACTORY SEALED. RETAIL BOXED. FULL HPE WARRANTY INCLUDED. AVAILABLE FROM CHICAGO COMPUTER SUPPLY.

Overview

As data center traffic grows, 10GbE networks become a bottleneck. 25GbE adapters provide higher bandwidth with better cost efficiency per gigabit, making them the next step for scalable infrastructure.

The HPE 640SFP28 2-Port 10/25GbE Adapter (817753-B21) delivers high-performance connectivity for HPE ProLiant servers. Built on Mellanox ConnectX-4 Lx technology, it supports both 10GbE and 25GbE speeds, enabling flexible deployment in modern data centers.

Key Features

• 2 × SFP28 ports supporting 10GbE and 25GbE
• Based on Mellanox ConnectX-4 Lx controller
• PCIe 3.0 interface for high throughput
• Supports RDMA over Converged Ethernet (RoCE v1/v2)
• Advanced offloads to reduce CPU usage
• Virtualization support (VXLAN, NVGRE)
• Jumbo frame support up to 9.6 KB
• Optimized for cloud, virtualization, and storage workloads

Technical Specifications

Brand: HPE
Model: 640SFP28 Adapter
Part Number: 817753-B21
Product Type: Network Adapter

Device Type

Ethernet Network Interface Card (NIC)

Ports

2 × SFP28 (10/25GbE)

Network Technology

• 10 Gigabit Ethernet
• 25 Gigabit Ethernet

Data Transfer Rate

Up to 25 Gbps per port

Interface

PCIe 3.0 x8 (also supports x4 lanes)

Controller

Mellanox ConnectX-4 Lx

Connectivity

Wired

Features

• RDMA over Converged Ethernet (RoCE v1/v2)
• TCP/IP offload, TSO, LSO
• Receive Side Scaling (RSS)
• VLAN and QoS support
• VXLAN and NVGRE support
• Jumbo frames up to 9.6 KB

Performance

Up to 100 Gbps bidirectional throughput

Application

• Virtualization platforms
• Cloud infrastructure
• High-speed storage networking
• Enterprise data centers

Compatibility

• HPE ProLiant DL Gen9 servers
• HPE Apollo servers

Use Cases

The HPE 817753-B21 adapter is ideal for environments requiring higher bandwidth than 10GbE, such as virtualization clusters, cloud deployments, and software-defined storage. It enables faster data transfer while maintaining compatibility with existing 10GbE infrastructure.

Why Choose HPE 817753-B21

• Dual-port 25GbE for increased bandwidth
• Backward compatible with 10GbE networks
• Supports RDMA for low-latency workloads
• Optimized for virtualization and cloud environments
• Reduces CPU overhead with hardware offloads
• Built on proven Mellanox technology
• Scalable and cost-effective upgrade path
• Brand new hardware backed by a full HPE warranty

FAQs

What is the HPE 817753-B21 used for?
It provides high-speed 10/25GbE networking for servers.

How many ports does it have?
It includes 2 SFP28 ports.

Does it support both 10Gb and 25Gb?
Yes, it supports both speeds.

Is this a switch module?
No. It is a server network adapter.

Does it support RDMA?
Yes, it supports RoCE v1 and v2.

What type of cables does it use?
It uses SFP28 optical modules or DAC cables.