  In this article, we present JUWELS Booster, a recently commissioned
high-performance computing system at the J\"ulich Supercomputing Center. With
its system architecture, most importantly its large number of powerful Graphics
Processing Units (GPUs) and its fast interconnect via InfiniBand, it is an
ideal machine for large-scale Artificial Intelligence (AI) research and
applications. We detail its system architecture, parallel, distributed model
training, and benchmarks indicating its outstanding performance. We exemplify
its potential for research application by presenting large-scale AI research
highlights from various scientific fields that require such a facility.
