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blackboxwarrior ,

China dominated the Top500 list by 2017, with 202 machines compared to 143 from the U.S. Then the U.S. restricted Chinese access to Intel processors and other U.S. hardware in 2015, followed by broader export restrictions under the Trump administration in 2019, which have been tightened further by the Biden administration in 2022. As a result, Chinese participation in the Top500 list dwindled, to some degree because access of Chinese entities to the latest hardware got harder and to some degree because Chinese scientists no longer want to share details about their machines with anyone.

Why is anyone surprised that the country with the highest research output, that has historically dominated the Top500 list, has the fastest supercomputers?

utopiah ,

“brute force is brute force” what a strange thing to say, it precisely is NOT.

If you have a lot of processors but they are poorly linked together, i.e low bandwidth, then they are NOT more powerful. That’s why e.g NVIDIA is selling InfiniBand and other very expensive solutions to datacenter.

Sure a supercomputer might have more CPU/GPU/etc than another but it doesn’t make it automatically more powerful, in term of what can actually be computed in comparable time (and arguably energy consumption).

That being said, China might be secretly #1 on TOP500 but until evidence of it is provided, I’m not sure what’s the point of such speculation is.

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