The latest American sanctions will hurt Chinese supercomputers
had two supercomputers ranked among the world’s fastest 500. Ten years later a machine named Tianhe-1topped the global league table. It was, though, based on Intel chips. So when in 2015 America barred its giant chipmaker from selling to four Chinese supercomputer labs—fearing that the machines were being used to simulate nuclear blasts—it might have expected China’s progress in the field to slow.
On June 21st America’s Commerce Department blacklisted another five Chinese supercomputing entities on the grounds that they too pose a threat to national security. The export ban prohibits American firms from selling them chips and “interconnects” that allow chips to talk to each other. An army-led institute that designed chips for the latest world-beating machine is on the list, as is Sugon, which has built a third of China’s 100 fastest ones.
A blow, for sure—but perhaps not a knockout. Last year new American computers ended China’s dominance; it will be pouring money into reclaiming it. Jack Dongarra, a supercomputing expert at the University of Tennessee who has scrutinised Sunway’s chip, calls it “very impressive”.
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