The speaker tentatively estimates that neurons can fire in sequence at roughly 1–1,000 times per second, depending on neuron type.

“of computations happening in sequence right there the amount of you know computations the amount of neurons that can fire in sequence in a second you know depends on the type of neuron but it's like uh you know hopefully i don't get this wrong between like one and a thousand uh depending on the type of neuron is my recollection”