China's LineShine becomes world's fastest supercomputer, topping US El Capitan for first time since 2017

A nine-year wait ends

China has placed a system at the top of the TOP500 supercomputer ranking for the first time since 2017. The LineShine machine, housed at the National Supercomputing Centre in Shenzhen, hit 2.198 exaflops in the June 2026 edition, enough to dislodge the US Department of Energy's El Capitan (1.809 exaflops) from the number‑one slot. The list, released on 23 June at the ISC High Performance conference in Hamburg, now records five systems above the exascale threshold.

“It's an impressive system. They upped us by developing a system that is not reliant on GPUs.”

Brute force with domestic silicon

LineShine took a path that sidesteps US export controls. It runs exclusively on CPUs, pairing a proprietary LingKun platform with home‑grown LX2 processors (304 cores each, 1.55 GHz, 13.79 million cores in total) and a custom interconnect. The machine draws about 42.2 megawatts, yielding an efficiency of 52.07 gigaflops per watt. Unlike the GPU‑heavy architecture of El Capitan and other western peers, LineShine did not need NVIDIA or AMD accelerators. The designers kept many details private but said they submitted the system voluntarily because it was developed without Chinese public funding.

The new top five

The reshuffled ranking shows El Capitan at No. 2, followed by Frontier (Oak Ridge National Laboratory, 1.353 exaflops) and Aurora (Argonne National Laboratory, 1.012 exaflops). Europe’s fastest machine, Jupiter Booster at Germany’s Jülich Supercomputing Centre, occupies fifth place with exactly one exaflop. The UK’s Isambard‑AI (Bristol) slipped to 11th, Australia’s Setonix sits at 86, and Portugal’s Deucalion is at 353.

LineShine (China)2.198

El Capitan (USA)1.809

Frontier (USA)1.353

Aurora (USA)1.012

Jupiter Booster (Germany)1

LineShine (China)

2.198 exaflops

El Capitan (USA)

1.809 exaflops

Frontier (USA)

1.353 exaflops

Aurora (USA)

1.012 exaflops

Jupiter Booster (Germany)

1 exaflops

Data from the article text

AI performance is another story

Technology and policy experts cautioned that the TOP500 benchmark does not reflect real‑world AI workloads. LineShine ranked fourth on a test designed to simulate AI‑like computing, and many of the world’s most capable AI‑oriented supercomputers (operated by Microsoft, Amazon, Google, and xAI) do not participate in the list. A 2025 study by Pilz, Sanders, Rahman and Heim estimated that xAI’s Colossus was already more powerful than El Capitan.

“If the hyperscalers submitted their systems, this 'world's fastest' would not crack the top five.”

Geopolitical backdrop

The breakthrough arrives during intensified US‑China tech competition. On 22 June President Donald Trump signed an executive order aiming to put the United States ahead of China in quantum computing. While the TOP500 result demonstrates China’s ability to produce a leadership‑class machine with its own semiconductor design, analysts view it primarily as a statement of self‑sufficiency rather than a direct AI race advantage.