Henry Markham is the leader of Blue Brain, and he claimed he could build a human brain in silico in a decade. It has been five years now, and they are just finishing the feasibility stage.
Markham claims to have modeled a network of 10,000 neurons, or 10^4. The human brain has 10^11 neurons, so it just needs 10^7 more. In fairness, if you could get the small scale brain right, duplicating it is not that hard.
IBM has a human brain simulator project running, and it has the number of neurons as in a cat's brain. It is called C2, and it runs on a supercomputer at Lawrence Livermore Laboratory. The computer runs 83 times slower than a cat brain, taking 83 seconds to process what takes a cat only one second. A human brain is about 20 times larger than a cat brain.
C2 also sucks electricity. The computer takes 1.4 MW, and a human version would be 28 MW -- which is the size of a small industrial-scale power plant or a medium sized hydropower project.
IBM is designing chips to make this faster and more efficient. This is funded by our defense department -- who wants brain-like chips to make smarter devices. IBM has also release Blue Matter, which is a language for programing artificial brains.
Programing artificial brains would be about the coolest job ever.
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