China's LineShine Supercomputer Leapfrogs US Rivals to Become World's Fastest, Topping Top500 for First Time Since 2017

Shenzhen, China – A supercomputer in China has outranked its US counterparts to become the world's most powerful, marking the first time since 2017 that a Chinese computer has topped the Top500 list – a ranking sometimes viewed as a measure of a nation's technological prowess.

The LineShine computer in Shenzhen displaced top-ranked US computer El Capitan in the Top500 rankings released on Tuesday. It was LineShine's debut on the list – a remarkable achievement for China's homegrown supercomputing industry.

Scientists involved in the Top500 project said LineShine at China's National Supercomputing Center achieved 2.198 exaflops, meaning it can perform more than 2 quintillion calculations per second. That processing power puts it ahead of the US government's El Capitan supercomputer at Lawrence Livermore National Laboratory in California, which now ranks second.

LineShine's Unique Architecture: CPUs Over GPUs

China's LineShine differs from other high-performance computers in that it runs entirely on conventional computer chips (CPUs), instead of the graphics processors (GPUs) commonly used for artificial intelligence. This architectural choice represents a departure from the dominant trend in supercomputing, which has increasingly relied on GPU acceleration for AI and machine learning workloads.

It requires about 42.2 megawatts of electricity to operate, according to the Top500 list – a significant power draw but comparable to other exascale machines.

Supercomputers, which are more than 1,000 times faster than a regular computer, can be used to hunt for medical breakthroughs, model climate systems, simulate nuclear explosions, predict human behaviour, and perform virtual weapons testing. The race to build ever-faster machines is driven by both scientific ambition and strategic competition between nations.

The Global Supercomputing Landscape

El Capitan, at the US government's Lawrence Livermore National Laboratory in California, now ranks second, ahead of two other US supercomputers at national laboratories in Tennessee and Illinois. Dropping to fifth place is the Jupiter supercomputer in Germany.

The five are the only publicly verified exascale computers in the world – machines capable of performing at least one exaflop (one quintillion calculations per second).

Other countries with machines in the top 10 include Italy, Switzerland and Japan. The UK has 11 machines in the list of 500. The University of Bristol's Isambard-AI is the highest ranked of that group at 11, down two places since the last ranking. Isambard-AI, fitted with 5,400 Nvidia "superchips," sits inside a black metal cage topped with razor wire.

Western Australia's Setonix – ranked 86th – is the best performing of the four machines located in Australia.

EU's €20bn Supercomputing Gambit

Last year the EU revealed a €20 billion (£17 billion) plan to build sites equipped with vast supercomputers to develop the next generation of AI models, as Europe attempts to catch leaders in the US and China.

The AI "gigafactories" will target "moonshot" innovations in areas such as healthcare, biotech, industry, robotics, and scientific discovery.

The best-performing AI factories have supercomputers equipped with up to 25,000 advanced AI processors, but a gigafactory would exceed 100,000 AI processors, the EU strategy document said.

These power-hungry facilities, which can require huge amounts of water for cooling, should run "as much as possible" on a green energy supply, an EU official said, with plans for "recycling" water if it was used.

However, campaigners fear power-hungry datacentres could undermine Europe's climate ambitions, as the energy demands of AI and supercomputing continue to grow exponentially.

Supercomputing as a Measure of National Power

The Top500 list has long been viewed as a proxy for national technological competitiveness. Countries that lead in supercomputing are often seen as leaders in scientific research, defence capabilities, and industrial innovation.

China's return to the top spot for the first time since 2017 – when the Sunway TaihuLight held the number one position – signals the country's continued investment in high-performance computing. Despite US export controls on advanced chips, China has developed its own homegrown processors and architectures to maintain its competitive edge.

LineShine's use of conventional CPUs rather than GPUs may reflect China's efforts to reduce dependence on foreign chip designs. The US has restricted exports of advanced chips to China in recent years, spurring a wave of domestic innovation in semiconductors and supercomputing.

What's Next in the Supercomputing Race

The race to build ever-faster supercomputers shows no signs of slowing. The next milestone, exascale computing, has already been achieved by the top five machines. The focus now shifts to energy efficiency, AI integration, and developing new architectures that can handle the massive datasets and complex calculations required for next-generation scientific discovery.

China's LineShine may not hold the top spot for long. The US, EU, and Japan are all investing heavily in next-generation supercomputers, and the competition is intensifying as the strategic importance of high-performance computing grows.

For now, however, China can celebrate a significant victory in the global technology race.