China Builds World's Fastest Supercomputer, Computing Power Exceeds U.S. El Capitan by Over 20%
N.R. Finch
China's Tianhe Xingguang (LineShine) tops the TOP500 at 2,198 exaflops — more than 20% faster than America's El Capitan — using zero export-controlled components. The chip blockade did not stop China from reclaiming the No. 1 spot in supercomputing.
How fast is LineShine, exactly?
Benchmark result: 2,198 exaflops — over 2 sextillion floating-point operations per second.
This means → it outperforms the previous No. 1, America's El Capitan, by more than 20%. El Capitan only claimed the top spot in 2024.
The system is deployed at the Shenzhen National Supercomputing Center and draws roughly 42.2 megawatts.
No GPUs — so what does it run on?
Nearly every top supercomputer and AI system today relies on GPUs (graphics processors — chips designed to handle massive parallel workloads). GPUs are also the centrepiece of US export controls on China.
LineShine takes a different path: it runs entirely on CPUs — about 45,000 LX2 processors, each with 304 cores at 1.55 GHz, built on the domestically designed "LingKun" platform.
In plain terms = the rest of the world builds supercomputers on the very chips China is banned from buying. This machine matched — and beat — them using homegrown CPUs instead.
Are the software and network homegrown too?
Nodes are linked by LingQi, a proprietary high-speed interconnect designed to cut latency and speed up data exchange.
The operating system is Kylin OS, a Linux-based domestic OS already widely used across Chinese research and government computing infrastructure.
This means → from chips to network to OS, the entire stack contains no US export-controlled components — a fully indigenous technology chain.
What does this mean for chip export controls?
China last topped the TOP500 nearly a decade ago. Its return comes just as the US tightens restrictions on GPU, advanced chip, and AI component exports to China.
This reflects a pattern: export-control pressure is accelerating China's push toward indigenous architectures — the tighter the blockade, the stronger the incentive to route around it.
The next question: whether this result prompts Washington to reassess the effectiveness of its current control strategy — a significant policy inflection point to watch.
Content is for reference only, not financial advice.