HPE
HPE Ethernet 10/25Gb 2-port 640SFP28 Adapter
Best high-performance network upgrade for data-intensive enterprise server environments.
Boost your network's performance with the HPE Ethernet 10/25Gb 2-port 640SFP28 Adapter. Designed for demanding environments like Telco and financial institutions, this adapter is ideal for select HPE ProLiant Gen9 and Apollo Servers. It effectively reduces the impact of overlay networking through VXLAN and NVGRE tunnel offloads. Experience lower latency and faster application response times thanks to RoCE technology, which bypasses the TCP/IP stack. This adapter ensures future-proofing by auto-negotiating to 10GbE, making it a versatile upgrade for high-bandwidth needs.
$526.18
Owner Satisfaction
4.5
/ 5
Category Rank
167
/ 961
#167 in Network Cards & Adapters
Price vs Category Average
-48%
Below average
Host Interface
3.08
/ PCI Express x
Who it's for
- Data center managers running high-density virtualization and flash storage
- IT administrators planning a gradual transition to faster network speeds
- System architects seeking to maximize server performance and CPU efficiency
Who should skip it
- Budget-conscious buyers needing standard 10Gb connectivity
- Network engineers lacking a fully compatible 25Gb infrastructure
- Users operating non-HPE hardware environments
Performance breakdown
Throughput Capacity
Dual 25GbE ports deliver massive bandwidth for demanding enterprise data environments.
Latency Efficiency
RoCE technology bypasses standard stacks to keep application response times snappy.
CPU Offloading
Advanced tunnel offloads significantly reduce processing overhead during complex network tasks.
Integration Flexibility
FlexibleLOM form factor ensures a clean, streamlined fit for compatible servers.
Future-Proofing
Seamless auto-negotiation to 10GbE provides a reliable bridge for evolving infrastructure.
Hardware Reliability
Built for the rigorous uptime demands of financial and telco sectors.
Key Specs
Host Interface
PCI Express 3.0 x8
Total Number of Ports
2
Maximum Data Rate
25 Gbps
Form Factor
FlexibleLOM
Connector Type
SFP
Weight (Approximate)
3.52 oz
Hardware Offloads
VXLAN tunnel offload, NVGRE tunnel offload
Warranty
Limited 1 Year
Features
- Supports 25GbE for high-demand applications.
- Dual ports for flexible connectivity.
- Reduces overlay networking impact.
- Lowers latency with RoCE technology.
- Auto-negotiates to 10GbE for future-proofing.
- Enhances CPU utilization.
- Includes VMA firmware for higher throughput.
- FlexibleLOM form factor for easy integration.
What customers say
Customers highly value this adapter for its premium performance and seamless integration within the HPE server ecosystem. Reviewers consistently praise its ability to deliver stable 25Gb throughput and significantly lower latency, making it excellent for demanding storage and virtualization workloads. Reliability under heavy load is a major strength, ensuring stability for mission-critical applications. While the superior quality justifies the cost for many enterprise users, the initial investment is noted as high. Some advanced feature configuration may require specialized knowledge. Overall satisfaction is strong among those prioritizing top-tier performance and dependable operation.
Know before you buy
The HPE 640SFP28 is specifically designed for select HPE ProLiant Gen9 and Apollo server models. Please verify your server's specific documentation to ensure it supports the FlexibleLOM form factor before purchasing.
Yes, the adapter is future-proofed with auto-negotiation capabilities. It can seamlessly scale down to 10GbE, allowing you to upgrade your infrastructure to 25GbE later without needing to replace the card.
RoCE (RDMA over Converged Ethernet) allows the adapter to bypass the standard TCP/IP stack. This reduces CPU overhead and significantly lowers latency, resulting in faster application response times for data-intensive tasks.
These hardware offloads handle the processing of overlay network traffic directly on the adapter. By offloading these tasks from the server's CPU, the card helps maintain high performance and efficiency in virtualized environments.
No, the adapter is powered directly through the PCI Express slot on your server. It does not require any additional power cables or external power sources.
This adapter uses the FlexibleLOM form factor. This design is specific to HPE servers and allows for easy integration into the dedicated LOM slot on the motherboard.
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$526