Powering Sub Micro-Second Latency Data Transfers

AMD Solarflare X4 Ethernet adapters are designed for high-performance electronic trading environments. Built for the speed of modern markets, AMD Solarflare Ethernet adapters enable ultra-low latency and real-time telemetry, empowering high-frequency trading, risk analytics, and financial data flows with precision, scale and confidence.

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AMD Solarflare ™ X4542 Ethernet Adapter
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Improving Performance Over Product Generations

AMD Solarflare™ Generational Latency Improvements1

  •  >320ns improvement over X2
  • >200ns improvement over X3
  •  Reduced Latency and Backwards compatibility

AMD EPYC™ Processors and AMD Solarflare™ Ethernet Adapters Power Low-Latency Networking2

  • Outstanding small packet performance in server-class CPUs
  • SDCI on AMD EPYC provides improved application latency.
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Continuing to Raise the Bar with Robust Performance

AMD Solarflare ™ X4542 Ethernet Adapter

X4542-PLUS | Dual QSFP

  •  Product Overview
    • Dual Port at 40/50/100 GbE
    • Four Ports at 1/10/25 GbE
    • Form Factor: Half height, half length
    • PCIe® Interface: Gen5 x8, PCIe CEM 5.0 compliant

AMD Solarflare™ X4522 Ethernet Adapter

X4522-PLUS | Dual SFP

  • Product Overview
    • Dual Ports at 1/10/25/50 GbE
    • Form Factor: Half height, half length.
    • PCIe® Interface: Gen5 x8, PCIe CEM 5.0 compliant
Learn More About the AMD Solarflare X4 Series
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Software

AMD Solarflare™ Onload™ Software

For data centers, Onload™ application acceleration software can dramatically accelerate and scale network-intensive workloads such as in-memory databases, software load balancers, and web servers.

In electronic trading environments, Onload software’s kernel bypass application acceleration enables amazing small packet performance with outstanding hardware latency.

Discover Onload

AMD Solarflare™ Enterprise Service and Support

AMD Solarflare™ Enterprise Service and Support (ESS) offers enterprise-class support services, including service level agreements (SLAs). 

ESS provides two service levels, Standard and Premium, for a broad range of customers, from small to multi-national corporations with mission-critical applications.

Learn more

Contact Us

Contact an AMD sales representative.

Contact Sales

Explore the full suite of networking solutions designed for high-performance AI infrastructure.

Footnotes
  1. 9xx5-251: Solarflare Generational latency progression: AMD Internal Testing as of 9/15/2025. Workload config: Onload benchmarking tool measuring Latency for payload ranging from 0B to 648B in ns. System Config: 2 Supermicro systems consists of 1 AMD EPYC 9575F (64C, 12x 32GB DDR5-6400, Max speed of 5GHz), Ubuntu 25.04 with kernel 6.14-23, Custom BIOS version 5.35 (pre-release), OS configured with AMDLL profile and BIOS configured for low latency) with AMD Solarflare X4542 (bundle 1.0.3.2 and bootloader 1.0.17.0). AMD Solarflare X2522 (bundle 8.5.2.1000); AMD Alveo X3522 (bundle 1. 17.7.30). Release Candidate version of Onload is used (https://github.com/Xilinx-CNS/onload/commit/0395821bb0685a3019018b3a9b45c4f30915146f). Driver version 6.6.1.1005. AMD Low Latency Tuning guide available at https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/white-papers/58649_amd-epyc-tg-low-latency.pdf. Average 0 to 648B Latency comparison compared to X4: X3 is 1.27X (27.2%) higher and X2 is 1.43X (42.9%) higher latency. 4B latency comparison compared to X4: X3 is 1.35X (34.9%) higher and X2 is 1.55X (55.5%%) higher latency.  

  2. 9xx5-252: X4 latency across platforms: AMD Internal Testing as of 9/15/2025. Workload config: Onload benchmarking tool measuring Latency for payload ranging from 0B to 648B in ns. System Config: 2 Supermicro systems consists of one AMD EPYC 9575F (64C, 12x 32GB DDR5-6400, Max speed of 5GHz), Ubuntu 25.04 with kernel 6.14-23, Custom BIOS version 5.35 (pre-release), OS configured with AMDLL profile and BIOS configured for low latency) with AMD Solarflare X4542 (bundle 1.0.3.2 and bootloader 1.0.17.0). Release candidate version of onload (https://github.com/Xilinx-CNS/onload/commit/0395821bb0685a3019018b3a9b45c4f30915146f). Driver version 6.1.1.1005. AMD Solarflare X4542 (bundle 1.0.3.2 and bootloader 1.0.17.0) AMD Low Latency Tuning guide available at https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/white-papers/58649_amd-epyc-tg-low-latency.pdf System config: 2 Supermicro systems consists of one AMD EPYC 4564P (AS -1015A-MT - 16C, up to 5GHz, 48GB memory). Driver version 6.1.1.1005, Custom BIOS version dated 8/30/24, kernel version 5.14.0-503. OS RHEL 9.4. AMD Solarflare X4542 (bundle 1.0.3.2 and bootloader 1.0.17.0) Driver version 6.1.1.1009 System config: 2 Dell R760 with one Intel Xeon 6534 (8 Core, 4.2GHz, 128GB, ), bios version 2.2.4, Ubuntu 25.04 with kernel 6.14.0-23, AMD Solarflare X4542 (bundle 1.0.3.2 and bootloader 1.0.17.0) driver version 6.1.1.1009, 2 NUMA nodes, 4B Payload size AMD Solarflare X4542 adapter installed on 2x 1P Intel Xeon 6534 based Supermicro system produced higher latency by 1.04X (4% higher) (23.7ns) compared to 2x 1P 9575F based Supermicro system AMD Solarflare X4542 adapter installed on 2x 1P EPYC 4564P based Supermicro system produced reduced latency by 0.91X (9% lower) (54ns) compared to 2x 1P 9575F based Supermicro system 0 to 648B Payload size AMD Solarflare X4542 adapter installed on 2x 1P Intel Xeon 6534 based Supermicro system produced lower latency by 1.02X (13ns) (1.6%) compared to 2x 1P 9575F based Supermicro system AMD Solarflare X4542 adapter installed on 2x 1P EPYC 4564P based Supermicro system produced lower latency by 1.07X (52ns) (6.7%) compared to 2x 1P 9575F based Supermicro system