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Table of Contents
Abstract
The ThinkSystem AMD X4522-PLUS 10/25GbE SFP28 2-port PCIe Low-Latency Ethernet Adapter is an advanced network adapter with the low latency needed particularly for the finance industry. Suitable workloads include those used by brokers, exchanges and market data vendors. The adapter has an architecture that is optimized for reliable operation and trade execution.
This product guide provides essential presales information to understand the X4522 adapter and its key features, specifications, and compatibility. This guide is intended for technical specialists, sales specialists, sales engineers, IT architects, and other IT professionals who want to learn more about the X4522 adapter and consider its use in IT solutions.
Change History
Changes in the July 8, 2026 update:
- Added OS support information - Operating system support section
Introduction
The ThinkSystem AMD X4522-PLUS 10/25GbE SFP28 2-port PCIe Low-Latency Ethernet Adapter is an advanced network adapter with the low latency needed particularly for the finance industry. Suitable workloads include those used by brokers, exchanges and market data vendors. The adapter has an architecture that is optimized for reliable operation and trade execution.
The following figure shows the ThinkSystem AMD X4522-PLUS 10/25GbE SFP28 2-port PCIe Low-Latency Ethernet Adapter.
Figure 1. ThinkSystem AMD X4522-PLUS 10/25GbE SFP28 2-port PCIe Low-Latency Ethernet Adapter (heatsink removed to show card detail)
Did you know?
For more than 15 years, the combination of AMD Solarflare™ low-latency Ethernet adapters and Onload™ family software have been used in virtually all facets of Capital markets such as leading-edge exchange systems, deterministic brokerage services, and sophisticated algorithmic trading applications.
Part number information
The following table shows the part number for the adapter.
| Part number | Feature code | Description |
|---|---|---|
| 4XC7B10840 | CHAX | ThinkSystem AMD X4522-PLUS 10/25GbE SFP28 2-port PCIe Low-Latency Ethernet Adapter(Generic FW) |
The part numbers include the following:
- One PCIe adapter
- Low-profile (2U) and full-height (3U) adapter brackets
- Documentation
Supported transceivers and cables
The following table lists the supported transceivers.
25Gb transceivers: When installed in this 25Gb Ethernet adapter, 25Gb transceivers are designed to operate at either 25 Gb/s or 10 Gb/s speeds as listed in the description of the transceiver, however the speed also depends on the negotiation with the connected switch. In most configurations, this negotiation is automatic, however in some configurations you may have to manually set the link speed or FEC mode.
The following table lists the supported optical cables.
The following table lists the supported direct-attach copper (DAC) cables.
Technical specifications
The X4522 adapter continues the Solarflare low-latency architecture with a custom ASIC design, delivering the same advanced acceleration, timing, and software capabilities as previous generations.
- Adapter hardware
- 2x SFP56 cages (compatible with SFP28)
- Support for direct attach copper (DAC) cables or optical transceivers
- PCIe Gen5 x8 host interface
- Low profile PCIe adapter
- Passively cooled
- Network acceleration
- Onload support - BSD sockets compliant TCP/UDP kernel bypass
- TCPDirect - TCP/UDP kernel bypass
- ef_vi low level API for high performance raw Ethernet networking
- Time synchronization and hardware time stamping
- On-board Stratum 3 compliant oscillator
- IEEE 1588-2008 PTPv2
- Hardware receive and transmit time stamping
- Security features
- Secure firmware upgrade
- Hardware root of trust
- Manageability and Remote Boot
- UEFI boot
- NC-SI over MCTP SMBus
- PLDM over MCTP SMBus
- MCTP PCIe VDM
Note: The X4522 adapter does not support XClarity OneCLI or out-of-band management in V3 servers.
Server support
The following tables list the ThinkSystem servers that are compatible.
Operating system support
The adapter supports the operating systems listed in the following table.
Tip: This table is automatically generated based on data from Lenovo ServerProven.
Regulatory approvals
The X4522 adapter has the following hardware certifications:
- FCC Part 15 – Radiated & Conducted Emissions (USA)
- CAN ICES-3(A)/NMB-3(A) – Radiated & Conducted Emissions (Canada)
- CISPR 32 – Radiated & Conducted Emissions (International)
- EN55032: 2015 – Radiated & Conducted Emissions (European Union)
- EN55035:2017 – Immunity (European Union)
- EMC Directive 2014/30/EU
- Electromagnetic Compatibility Regulations 2016 (UK)
- VCCI (Class A)– Radiated & Conducted Emissions (Japan)
- KCC Class A (Korea)
- CNS13438 – Radiated & Conducted Emissions (Taiwan)
- CNS 15663 - RoHS (Taiwan)
- AS/NZS CISPR 32 – Radiated and Conducted Emissions (Australia/New Zealand)
- Article 58-2 of Radio Waves Act, Clause 3 (Korea)
Physical specifications
The X4522 adapter has the following physical specifications:
- Length: 168 mm (6.6 inches)
- Height: 69 mm (2.7 inches)
Operating environment
The X4522 adapter is supported in the following environment:
- Temperature:
- Operating: 0°C to 55°C (32°F to 131°F)
- Storage: -40°C to 75°C (-40°F to 167°F)
- Humidity:
- Operating: 8% to 90%
- Storage: 5% to 95%
Warranty
One year limited warranty. When installed in a Lenovo server, this adapter assumes the server’s base warranty and any warranty upgrades.
Related publications
For more information, refer to these documents:
- ServerProven compatibility
https://serverproven.lenovo.com/ - AMD Solarflare X4 Ethernet Adapters product page
https://www.amd.com/en/products/ethernet-adapters/solarflare-x4.html
Trademarks
Lenovo and the Lenovo logo are trademarks or registered trademarks of Lenovo in the United States, other countries, or both. A current list of Lenovo trademarks is available on the Web at https://www.lenovo.com/us/en/legal/copytrade/.
The following terms are trademarks of Lenovo in the United States, other countries, or both:
Lenovo®
ServerProven®
ThinkSystem®
XClarity®
The following terms are trademarks of other companies:
AMD, AMD Solarflare™, Onload™, and Solarflare™ are trademarks of Advanced Micro Devices, Inc.
Intel®, the Intel logo is a trademark of Intel Corporation or its subsidiaries.
Linux® is the trademark of Linus Torvalds in the U.S. and other countries.
NVIDIA® is a trademark of NVIDIA Corporation.
Other company, product, or service names may be trademarks or service marks of others.
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Full Change History
Changes in the July 8, 2026 update:
- Added OS support information - Operating system support section
First published: June 30, 2026
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