The speaker says estimates put the human brain's computation at roughly 1e15 FLOPs per second, with uncertainty, and that an H100 performs computation on roughly the same order.

“That was about, there's some estimates of how much computation the human brain does per second and it's about one e15 flop or so. It's a bit unclear,”

“but and then it turns out that an H100 roughly does on that order of computation and so you can ask the question of how long does it take for an H100 to pay itself back.”