US Government Supercomputer 1 is a large GPU cluster operated by United States Government, located in the United States, in the public sector. It came online around November 2014. At that moment it ranked number 3 among known clusters.
It is built on 4,160 NVIDIA Tesla K40c. That amounts to about 10.61 H100e of AI compute. The cluster draws roughly 2.89 MW.
Epoch AI rates the certainty of this record as confirmed.