One I know of is the EU-funded LUMI supercomputer: https://www.lumi-supercomputer.eu/lumis-full-system-architec...

"The AMD MI250X GPU is in a class of its own now and for a long time to come. The technical supremacy and performance per watt were the primary reasons why AMD’s MI250X GPUs were selected for LUMI, explains Pekka Manninen, Director of LUMI Leadership Computing Facility."

You might look at the current No. 1 on the Top500 list, Frontier at ORNL. https://www.olcf.ornl.gov/frontier/ Arguably the most powerful machine today, delivering >1 Exaflop/s performance.

Also El Capitan supercomputer, and there are more.