No. 1: Tianhe-2 (Chinese National University of Defense Technology)
For the second list in a row, China's vast Tianhe-2 is the fastest supercomputer in the world. And at a whopping 33.86 petaflops, it's not really all that close. Boasting a whopping 3.1 million main processor cores and 2.7 million accelerator cores, Tianhe-2 is the winner and still champion.