Detailed Specifications
HPE 840139-001 Ethernet 10/25Gb 2-Port 640FLR-SFP28 Adapter
Overview
The HPE 840139-001 is a dual-port network adapter in FlexibleLOM (FLR) form-factor, designed for select HPE ProLiant Gen9 and Gen10 rack servers. It supports 10 Gb/s and 25 Gb/s Ethernet connectivity via SFP28 interfaces, making it suitable for high-bandwidth uplinks, virtualised servers and storage-traffic offload. The adapter installs directly into the server's dedicated FLR slot, conserving standard PCIe slots and simplifying upgrade paths. It supports advanced features including IPv6, jumbo frames, VXLAN/NVGRE tunnel offload and RoCE for latency-sensitive workloads. The device is tailored for data-centre compute servers where 25 Gb bandwidth is becoming the norm.
Key Features
2 × SFP28 ports supporting 10 Gb/s and 25 Gb/s speeds
FlexibleLOM (FLR) form-factor for HPE ProLiant servers
Supports TCP/IP offload, RDMA over Converged Ethernet (RoCE)
Jumbo frames (up to ~9.6 KB) and full-line rate for overlay networking
Technical Specifications
| Specification | Value |
|---|
| Brand | HPE |
| Part Number | 840139-001 |
| Product Type | Ethernet 10/25 Gb 2-Port 640FLR-SFP28 Adapter |
| Interface (Bus) | FlexibleLOM (FLR) |
| PCI Specification Revision | PCIe 3.0 ×8 |
| Ports | 2 × SFP28 |
| Supported Link Speeds | 10 Gb/s, 25 Gb/s |
| Bidirectional Throughput | Up to 100 Gb/s aggregate |
| Bandwidth per Port | 50 Gb/s |
| Jumbo Frame Support | Up to ~9.6 KB |
| Typical Power Consumption | ~9.7 W |
| Operating Temperature | Approx. 41 °F to 140 °F (5 °C to 60 °C) |
| Media Type | Optical fibre (SFP28) |
| Advanced Features | IPv6, VLAN tagging, LACP, VXLAN/NVGRE, RoCE |
