Preferred Networks MN-2 is a large GPU cluster operated by Preferred Networks Inc, located in Japan, in the private sector. It came online around July 2019. At that moment it ranked number 21 among known clusters.
It is built on 1,024 NVIDIA V100. That amounts to about 64.68 H100e of AI compute. The cluster draws roughly 0.68 MW. Its hardware is estimated at $20M.
Epoch AI rates the certainty of this record as confirmed.