NVIDIA SATURN V Phase 2 is a large GPU cluster operated by NVIDIA, located in the United States, in the private sector. It came online around March 2018. At that moment it ranked number 3 among known clusters.
It is built on 5,280 NVIDIA V100. That amounts to about 334 H100e of AI compute. The cluster draws roughly 3.63 MW. Its hardware is estimated at $104M.
Epoch AI rates the certainty of this record as likely. This was first mentioned November 2017, but it appears to not be operational yet at that time A later version of the supercomputer was actually four clustesrs, but its unclear if this was