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Do we know what hardware each was using? Aside from time, s criticism of the previous AlphaZero/Stockfish match was that AlphaZero was using a tremendous amount of TPU power while Stockfish was running on, essentially, an average laptop.

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They used the same config as TCEC.

"Stockfish was configured according to its 2016 TCEC world championship superfinal settings: 44 threads on 44 cores (two 2.2GHz Intel Xeon Broadwell CPUs with 22 cores), a hash size of 32GB, syzygy endgame tablebases, at 3 hour time controls with 15 additional seconds per move"

For comparison, AlphaZero used 4 TPUs and the same number of cores. So more computing power but not absurdly so.

And it's literally true that the TPU has more computing power than a CPU in terms of e.g. flops but part of the reason why NNs are so powerful is that their operations can effectively be parallelized whereas Stockfish is optimized for CPUs that can efficiently branch and do smaller, more flexible operations.

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