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AMD

March 23, 2026
Launching Cloudflare’s Gen 13 servers: trading cache for cores for 2x edge compute performance

Cloudflare’s Gen 13 servers double our compute throughput by rethinking the balance between cache and cores. Moving to high-core-count AMD EPYC ™ Turin CPUs, we traded large L3 cache for raw compute density. By running our new Rust-based FL2 stack, we completely mitigated the latency penalty to unlock twice the performance.

Syona Sarma,JQ Lau, and Jesse Brandeburg

March 23, 2026
Inside Gen 13: how we built our most powerful server yet

Cloudflare's Gen 13 servers introduce AMD EPYC™ Turin 9965 processors and a transition to 100 GbE networking to meet growing traffic demands. In this technical deep dive, we explain the engineering rationale behind each major component selection.

Syona Sarma,JQ Lau,Ma Xiong, and Victor Hwang

October 15, 2024
Analysis of the EPYC 145% performance gain in Cloudflare Gen 12 servers

Cloudflare’s Gen 12 server is the most powerful and power efficient server that we have deployed to date. Through sensitivity analysis, we found that Cloudflare workloads continue to scale with higher core count and higher CPU frequency, as well as achieving a significant boost in performance with larger L3 cache per core.

JQ Lau and Syona Sarma

September 25, 2024
Cloudflare’s 12th Generation servers — 145% more performant and 63% more efficient

Cloudflare is thrilled to announce the general deployment of our next generation of server — Gen 12 powered by AMD Genoa-X processors. This new generation of server focuses on delivering exceptional performance across all Cloudflare services, enhanced support for AI/ML workloads, significant strides in power efficiency, and improved security features.

JQ Lau,Ma Xiong, and Syona Sarma

December 1, 2023
Cloudflare Gen 12 Server: bigger, better, cooler in a 2U1N form factor

Cloudflare Gen 12 Compute servers are moving to 2U1N form factor to optimize the thermal design to accommodate both high-power CPUs (>350W) and GPUs effectively while maintaining performance and reliability

JQ Lau and Syona Sarma

October 5, 2021
Measuring Hyper-Threading and Turbo Boost

Contemporary x86 processors implement some variants of Hyper-Threading and Turbo Boost. We decided to learn about the implications of these two technologies.

Sung Park

August 31, 2021
The EPYC journey continues to Milan in Cloudflare’s 11th generation Edge Server

At Cloudflare we aim to introduce a new server platform to our edge network every 12 to 18 months or so, to ensure that we keep up with the latest industry technologies and developments.

Chris Howells

May 6, 2021
Branch predictor: How many "if"s are too many? Including x86 and M1 benchmarks!

Is it ok to have if clauses that will basically never be run? Surely, there must be some performance cost to that...

Marek Majkowski

March 1, 2020
Why Cloudflare Chose AMD EPYC for Gen X Servers

Looking back at this week's posts on the design, specifications, and performance of Cloudflare’s Gen X servers using AMD CPUs. Every server can run every service. This architectural decision has helped us achieve higher efficiency across the Cloudflare network.

Nitin Rao

February 27, 2020
Gen X Performance Tuning

We have partnered with AMD to get the best performance out of this processor and today, we are highlighting our tuning efforts that led to an additional 6% performance. Thermal design power (TDP) and dynamic power, amongst others, play a critical role when tuning a system.

Sung Park

February 24, 2020
Cloudflare’s Gen X: Servers for an Accelerated Future

We designed and built Cloudflare’s network to be able to grow capacity quickly and inexpensively; to allow every server, in every city, to run every service; and to allow us to shift customers and traffic across our network efficiently.

Nitin Rao and John Graham-Cumming

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