"Kraken" super comp in Tenn was taken offline in 2014
At one time it was the most powerful computer in civilian (academic) custody. It was upgraded a couple of times but dropped in the standings and was decommissioned in 2014
couldn't find any account of what happened to the hardware,might be mining bit coin in a china spy basement.
https://www.nics.tennessee.edu/kraken-retrospective