I mean, the easiest solution is just “make it smaller and use active cooling”.
The brain already uses active liquid cooling of course, so this is just make it smaller and cool it harder.
I have not had time to investigate your claimed physics on how cooling scales, but I”m skeptical—pumping a working coolant through the compute volume can only extract a limited constant amount of heat from the volume per unit of coolant flowing per time step (this should be obvious?), and thus the amount of heat that can be removed must scale strictly with the surface area (assuming that you’ve already maxed out the cooling effect per unit coolant).
So reduce radius by 2x and you reduce surface area and thus heat pumped out by 4x, but only reduce heat production via reducing wire length by at most 2x as I described in the article.
Active cooling ends up using more energy as you are probably aware. Moving to a colder environment is of course feasible (and used to some extent by some datacenters), but that hardly gets OOM gains on earth.
The brain already uses active liquid cooling of course, so this is just make it smaller and cool it harder.
I have not had time to investigate your claimed physics on how cooling scales, but I”m skeptical—pumping a working coolant through the compute volume can only extract a limited constant amount of heat from the volume per unit of coolant flowing per time step (this should be obvious?), and thus the amount of heat that can be removed must scale strictly with the surface area (assuming that you’ve already maxed out the cooling effect per unit coolant).
So reduce radius by 2x and you reduce surface area and thus heat pumped out by 4x, but only reduce heat production via reducing wire length by at most 2x as I described in the article.
Active cooling ends up using more energy as you are probably aware. Moving to a colder environment is of course feasible (and used to some extent by some datacenters), but that hardly gets OOM gains on earth.