Samsung SSC-21 is a large GPU cluster operated by Samsung, located in South Korea, in the private sector. It came online around November 2021. At that moment it ranked number 20 among known clusters.
It is built on 1,760 NVIDIA A100. That amounts to about 555 H100e of AI compute. The cluster draws roughly 1.51 MW. Its hardware is estimated at $60M.
Epoch AI rates the certainty of this record as confirmed.