https://siliconandsystems.com/en/ An independent tech review covering semiconductors, computer architecture, systems, and AI infrastructure. Slower than news, easier than papers. en https://siliconandsystems.com/en/articles/cxl-onechip/ https://siliconandsystems.com/en/articles/cxl-onechip/ Mon, 24 Aug 2026 00:00:00 GMT A training step completes only after every participant reaches the same barrier. A recent review in Nature Reviews Electrical Engineering argues that addressing this at rack scale is a silicon problem rather than a bandwidth problem, and identifies the three hardware structures it requires.