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

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This post details the engineering rationale behind the selection of components for Cloudflare's Gen 13 server hardware. It covers the evaluation and selection of the AMD EPYC Turin 9965 processor, highlighting the trade-offs in L3 cache versus core count and the benefits of increased core count for the FL2 software stack. It also details the memory configuration, emphasizing the use of 12 channels of DDR5-6400 ECC RDIMMs for maximized bandwidth and the decision to maintain a 4 GB per core ratio for sufficient capacity and future growth. The storage subsystem upgrade to PCIe 5.0 NVMe drives and the addition of front drive bays for U.2 drives are also discussed.