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by kincl 2605 days ago
GPUs help considerably here, taking a look at previous ORNL machines:

  Jaguar | 2.3 PF XT5 (CPU-only)      | 7 MW for HPL
  Titan  | 27 PF XK7 (1:1 CPU to GPU) | 8.2 MW
  Summit | 186 PF (2:6 CPU to GPU     | 8.8 MW
Overall, substantial changes in computing power and 10%-20% increase in power.