5. Seaborg, SP Power3 375 MHz
The National Energy Research Scientific Computing Center (NERSC) provides high-performance computing tools and expertise that enable computational science of scale, in which large, interdisciplinary teams of scientists attack fundamental problems in science and engineering that require massive calculations and have broad scientific and economic impacts. At the heart of NERSC’s computer hardware capability is a 6,656-processor IBM RS/6000 SP, nicknamed Seaborg. Seaborg is a distributed memory machine with 6,080 compute processors. Each processor has a peak performance of 1.5 GFlops. The processors are distributed among 380 nodes with 16 processors per node. Each node has between 16 and 64 GBytes of memory (4 have 64 GBytes; 64 have 32 GBytes; 312 have 16 GBytes).