Ruby isn’t saying that computers have faster clock speeds than biological brains (which is definitely true), he’s claiming something like “after we have human-level AI, AIs will be able to get rapidly more powerful by running on faster hardware”; the speed increase is relative to some other computers, so the speed difference between brains and computers isn’t relevant.
Faster than biological brains, by 6 orders of magnitude.
Ruby isn’t saying that computers have faster clock speeds than biological brains (which is definitely true), he’s claiming something like “after we have human-level AI, AIs will be able to get rapidly more powerful by running on faster hardware”; the speed increase is relative to some other computers, so the speed difference between brains and computers isn’t relevant.