NVIDIA Selene Phase 1 is a large GPU cluster operated by NVIDIA, located in the United States, in the private sector. It came online around June 2020. At that moment it ranked number 4 among known clusters.
It is built on 2,240 NVIDIA A100. That amounts to about 706 H100e of AI compute. The cluster draws roughly 2.41 MW. Its hardware is estimated at $62M.
Epoch AI rates the certainty of this record as confirmed.