NVIDIA Selene Phase 2 is a large GPU cluster operated by NVIDIA, located in the United States, in the private sector. It came online around November 2020. At that moment it ranked number 2 among known clusters.
It is built on 4,480 NVIDIA A100. That amounts to about 1.4K H100e of AI compute. The cluster draws roughly 4.74 MW. Its hardware is estimated at $121M.
Epoch AI rates the certainty of this record as confirmed.