NVIDIA Circe is a large GPU cluster operated by NVIDIA, located in the United States, in the private sector. It came online around November 2018. At that moment it ranked number 22 among known clusters.
It is built on 576 NVIDIA Tesla V100 SXM2. That amounts to about 36.38 H100e of AI compute. The cluster draws roughly 0.4 MW. Its hardware is estimated at $13M.
Epoch AI rates the certainty of this record as confirmed.