One hemisphere of the mouse neocortex contains 8 billion neurons with 8000 synapses per neuron. To run a full-fledged simulation, IBM researchers required the BlueGene / L supercomputer on 4096 processors with 1 TB of RAM. For ten seconds of working time, the supercomputer simulated one second of the work of an almost complete mouse brain (8 billion neurons with 6,300 synapses).
The human brain contains 100 billion neurons, that is, 12.5 times more than that of a mouse. How much time is required by Moore's law in order for the emulation program to run on a regular PC - read it yourself.
True, scientists still do not know exactly whether it will turn out a full-fledged human brain, if you add up the brains of twelve mice. ')
via Open the Future , Computer Science magazine (PDF)