Musk's take on space datacenters: run chips hot, since vacuum can't cool them anyway
sudoraohacker · x · 2026-10-21
A Russian-language technical thread breaks down Musk's argument on cooling for space datacenters. The common intuition — space is -270°C so chips cool themselves — is wrong: vacuum has no air or water to carry heat away, acting like a giant thermos. Heat can only be shed via infrared radiation from large radiator panels.
By the Stefan–Boltzmann law, radiated power scales with the fourth power of absolute temperature. Raising chip operating temperature just 20% in Kelvin doubles radiator output, halving radiator size and mass. Hence Musk's counterintuitive stance: run chips hot rather than fight to cool them — a key physics-driven tradeoff for orbital compute.
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