[neilv]

https://en.wikipedia.org/wiki/Cheyenne_(supercomputer)

> The Cheyenne supercomputer at the NCAR-Wyoming Supercomputing Center (NWSC) in Cheyenne, Wyoming began operation as one of the world’s most powerful and energy-efficient computers. Ranked in November 2016 as the 20th most powerful computer in the world[1] by Top500, the 5.34-petaflops system[2] is capable of more than triple the amount of scientific computing[3] performed by NCAR’s previous supercomputer, Yellowstone. It also is three times more energy efficient[4] than Yellowstone, with a peak computation rate of more than 3 billion calculations per second for every watt of energy consumed.[5]