- Essays··9 min read
China's exascale bet against GPUs — and what LineShine's interconnect tells us about post-NVLink fragmentation
LineShine, which debuted atop the June 2026 TOP500, is the first system to exceed two exaflops of sustained double-precision performance without GPU accelerators — built under US export controls from indigenous Arm processors, on-package HBM, and a custom fat-tree fabric called LingQi. The significance is not the ranking: China has closed the interconnect gap that sovereign exascale programmes could not paper over, and the scale-up fabric market is now genuinely fragmented.
supercomputinginterconnectai-infrastructurechina-techRead - Essays··13 min read
Sunday Essay — The Substrate Bill Comes Due
For a decade the AI conversation was about the model; the substrate was a logistics problem handed to the cloud team. The last six weeks changed that — a rack that draws a quarter-megawatt, memory sold out before the GPU ships, grid connections you cannot procure inside an investment horizon, and an interconnect that quietly became a vendor product again. The bill has come due.
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