NCM plays each Stockfish dev build 20,000 times against Stockfish 15. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.
NCM uses Dell R7515 128-thread EPYC 7702 dedicated servers to perform its dev build tests. Each server plays 16 games concurrently with 30+0.3 time controls. Hash is set to 128MB, and Threads is set to 8.