Enlarge / A photo of the Cheyenne supercomputer, which is now up for auction. (credit: US General Services Administration) On Tuesday, the US General Services Administration began an auction for the decommissioned Cheyenne supercomputer, located in Cheyenne, Wyoming. The 5.34-petaflop supercomputer ranked as the 20th most powerful in the world at the time of its installation in 2016.