NVIDIA DGX SuperPOD 2019 is a large GPU cluster operated by NVIDIA, in the private sector. It came online around June 2019. At that moment it ranked number 11 among known clusters.
It is built on 1,536 NVIDIA Tesla V100 DGXS 32 GB. That amounts to about 97.02 H100e of AI compute. The cluster draws roughly 0.85 MW. Its hardware is estimated at $47M.
Epoch AI rates the certainty of this record as confirmed.