Inside Gen 13: how we built our most powerful server yet

Cloudflare's transition to the FL2, a Rust-based rewrite of its core request handling layer, has led to the introduction of the Gen 13 server hardware, which features substantial improvements over its predecessor, Gen 12. The Gen 13 server is equipped with a 192-core AMD EPYC™ Turin 9965 processor, 768 GB of DDR5-6400 memory, and 24 TB of PCIe 5.0 NVMe storage, offering up to twice the throughput while maintaining latency SLAs and improving performance per watt by up to 50%. This new architecture supports up to 60% higher throughput per rack, doubles memory capacity, and quadruples network bandwidth, while integrating PCIe encryption hardware support and improving thermal management for powerful PCIe accelerators. The server's design focuses on maintaining operational simplicity, forward compatibility, and enhanced efficiency, ensuring it meets the growing demands of Cloudflare's global network and software stack. As Gen 13 servers begin deployment, Cloudflare continues to plan for future generations, emphasizing the company's commitment to building a better Internet.