Earth is at Type 0.73 on the Kardashev scale, and AI chip power consumption draws attention
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According to the Kardashev scale and Sagan's fractional classification, global energy use in 2024 was 592 exajoules, about 19 trillion watts, placing human civilization at Type 0.73. Epoch AI estimates that by early 2025, the world's installed AI chips were roughly equivalent to 4 million H100s; a single H100 running at full load for a year consumes 6,132 kWh, roughly equal to a Tesla Model Y driving 21,000 miles.
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- Hacker News AIType 0.73: Earth on the Kardashev scale, and why AI is short of wire
An essay applies Kardashev's power-based ranking of civilizations to Earth, which rates about Type 0.73 on Sagan's decimal version, and examines the energy demands of AI data centres. It argues that the current constraint is not generation but grid connections, transmission lines and chipmaking concentrated in Taiwan and the Netherlands, and it weighs Jevons's claim that efficiency raises rather than lowers total consumption.
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