[extropy-chat] Wetware vs. Hardware (was IQ vs Upload)

[Keith Henson]

At 03:10 AM 22/06/05 +0100, you wrote:
>Keith Henson wrote:

snip

>>I remember looking into this when it was reported.  At the time I 
>>remarked how the surface area of his brain seems to be the important parameter.
>>
>>This is consistent with William Calvin's analysis that the hexagonal 
>>spaced cortical column is the "element of computation" in brains.  I ran 
>>a computation--which is probably can be found if someone looks--assuming 
>>that each of these columns could be modeled and connected to its 
>>neighbors by a 1 cm square silicon processor.  I seem to remember it was 
>>something like 150 meters on a side square of processors to simulate a 
>>human brain this way.
>ie 22500 sq metres.
>Given Moore's Law and 25yrs that reduces to about 0.3 sq metres, or a chip 
>approx 60cm on edge.
>Or something rather more compact if we use wafer scale integration and 
>stacking.

Yeah.  It might fit inside the volume of a human skull.  Imagine that.

Keith Henson