Supercomputer Vs Human Brain
I will just show the statistics of last attempt to mimic the brain process.

In 2011 fastest computer in Japan was launched: 

K computer OR SPARC64 VIIIfx 2.0GHz

Features:


Manufacturer:    Fujitsu
Cores:   705,024
Linpack Performance (Rmax)   10,510 TFlop/s
Theoretical Peak (Rpeak) 11,280.4 TFlop/s
Power:   12,659.89 kW
Memory:  1,410,048 GB (16GB RAM per CPU)
Processor:   SPARC64 VIIIfx 8C 2GHz (88,128 CPUs, 8-core each)
Operating System:    Linux


It's currently world's 4th fastest supercomputer. 

Source: Top 500 Supercoputers



Image Source: http://wondergressive.com/wp-content/uploads/2014/01/WG-k-computer.jpg

Now, 


  An 83,000-Processor Supercomputer Can Only Match 1% of Your Brain
  
  ...The most accurate simulation of the human brain to date has been
  carried out in a Japanese supercomputer, with a single second’s worth
  of activity from just one per cent of the complex organ taking one of
  the world’s most powerful supercomputers 40 minutes to calculate.
  Researchers used the K computer in Japan, currently the fourth most
  powerful in the world, to simulate human brain activity. The computer
  has 705,024 processor cores and 1.4 million GB of RAM, but still took
  40 minutes to crunch the data for just one second of brain activity...
  
  Source: http://gizmodo.com/an-83-000-processor-supercomputer-only-matched-one-perc-1045026757


Human Brain:


  Do we have brain to spare?
  
  by David A. Drachman, MD
  
  Within the liter and a half of human brain, stereologic studies
  estimate that there are approximately 20 billion neocortical neurons,
  with an average of 7,000 synaptic connections each.1 The cerebral
  cortex has about 0.15 quadrillion synapses—or about a trillion
  synapses per cubic centimeter of cortex. The white matter of the brain
  contains approximately 150,000 to 180,000 km of myelinated nerve
  fibers at age 20, connecting all these neuronal elements. Despite the
  monumental number of components in the brain, Szentagothai estimated
  that each neuron is able to contact any other neuron with no more than
  six interneuronal connections—“six degrees of separation.”




Image Source: http://www.nature.com/polopoly_fs/7.2933.1329907514!/image/far-to-go.jpg_gen/derivatives/fullsize/far-to-go.jpg

Why Brain beats Supercomputer?


  Why is it so hard for computers to reproduce what your grey matter
  does as a matter of course? Volume. The human brain consists of about
  200 billion nerve cells (neurons) that are linked together by
  trillions of connections called synapses. As the tiny electrical
  impulses shoot across each neuron, they have to travel through these
  synapses, each of which contains about 1000 different switches that
  route that electrical impulse. In total, one human brain could contain
  hundreds of trillions of these neural pathways. It's like a Choose
  Your Own Adventure book that stretches from here to Jupiter.