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In lecture, professor mentioned that, even though TITAN was ranked NO.2 in the world (in terms of FLOPS), it probably has more practical applications. I guess I wanted to ask: is it because the real life problems are very difficult to be parallelized so as to make use of all the resources provided by those supercomputers?


According to this article, it seems like the #1 supercomputer, Tianhe-2, is often bottlenecked by limited data and communication bandwidth. That means that it's very difficult to actually take advantage of the full computational power of the machine. But of course, you still need the energy to run the whole thing - so it's less cost efficient per calculation.