How much computing power would be required to simulate a human brain (perhaps at an abstract level)? Drag the distribution to reflect your best guess. The model automatically takes into account your previous answer on the in-principle feasibility of AI — answer as though neuromorphic human-level AI is definitely possible.

• Claim: "The 'Blue Brain' project was launched by the Brain Mind Institute, EPFL, Switzerland and IBM, USA in May, 2005. It aims to build an accurate software replica of a neocortical column within 2-3 years. (This was subsequently achieved.— ed.) The column will consist of 10,000 morphologically complex neurons with active ionic channels. The neurons will be interconnected in a 3-dimensional space with 10⁷ -10⁸ dynamic synapses. This project will thus use a level of simulation that attempts to capture the functionality of individual neurons at a very detailed level. The simulation is intended to run in real time on a computer performing 22.8*10¹² flops. Simulating the entire brain in real time at this level of detail (which the researchers indicate as a goal for later stages of the project) would correspond to circa 2*10¹⁹ ops."
  Implication: It may require supercomputers 10,000 times faster than 2008's best to simulate the human brain. If hardware costs keep falling exponentially, computers this fast could be available around 2035, but if hardware improvements level off, it could be much longer, possibly never.
  Source: Bostrom, Nick. "How long before superintelligence?" International Journal of Future Studies 2 (1998): 1-13. <http://www.nickbostrom.com/superintelligence.html>.

• Claim: Estimates from reverse-engineering the auditory cortex and cerebellum give 100-1,000 TFLOPS (10¹⁴ to 10¹⁵ ops/sec) for human brain functional equivalence. This is similar to the computing power of the top 10 supercomputers in 2008.
  Implication: If we aren't there yet, we'll be there soon.
  Source: Kurzweil, Ray. The Singularity Is Near: When Humans Transcend Biology. New York: Penguin (Non-Classics), 2006. Ch. 3, Pg. 124.