[SPONSORED CONTENT]  In this interview conducted on behalf of Dell Technologies, insideHPC spoke with Dr. Paul Calleja, director of Research Computing Services at the University of Cambridge, about the Wilkes3 supercomputer, currently ranked no. 4 on the Green500 list of the world’ most energy efficient supercomputers. Dr. Calleja discusses how he and his team developed an low-power strategy for the 80-node Wilkes3 system by the adoption of GPUs and lower clock speeds balanced against high throughput. He also explains how the Dell PowerEdge XE8545 -based cluster, which utilizes AMD EPYC CPUs and the Mellanox InfiniBand interconnect, fits within the university’s larger, heterogeneous Cumulus system, comprised of 2,500 Intel x86 servers.