China's LineShine supercomputer and Nvidia Blackwell black‑market surge underscore US‑China AI hardware clash

China's new LineShine system, housed in the Shenzhen Cloud Computing Center, has been ranked the world's fastest supercomputer, outperforming the US‑based El Capitan by more than 20 %. Unlike most top machines that rely on US‑origin GPU chips, LineShine uses domestically designed Arm‑based CPUs, featuring nearly 14 million cores across 90 cabinets. The CPU‑centric architecture is seen as a workaround to US export restrictions on high‑performance GPUs.

At the same time, demand for Nvidia's latest Blackwell GPUs remains strong in China despite a US blacklist that bars direct sales. Reports indicate that Nvidia DGX B300 AI servers, which house eight Blackwell GPUs, are being sold on the black market for over 8 million yuan (about $110,000), roughly double the official US price of $400,000. The surge reflects continued Chinese interest in cutting‑edge AI hardware and highlights the challenges of enforcing export controls.

Together, the LineShine achievement and the inflated black‑market prices illustrate a widening US‑China technology rivalry, with China seeking self‑sufficiency through CPU‑based supercomputing while the United States tightens regulations on advanced AI chips.