GravitySimulator

gravitySimulator is a novel supercomputer that incorporates special-purpose GRAPE hardware to solve the gravitational n-body problem. It is housed in the Center for Computational [Relativity and Gravitation] at the Rochester Institute of Technology. It became operational in 2005.
[Image:gravitySimulator.jpg|thumb|gravitySimulator]
The computer consists of 32 nodes, each of which contains a GRAPE-6A board in a Peripheral Component Interconnect slot. The GRAPE boards use pipelines to compute pairwise forces between particles at a speed of 130 Gflops.
The on-board memory of each GRAPE board can hold data for 128,000 particles, and by combining 32 of them in a cluster, a total of four million particles can be integrated, at sustained speeds of 4Tflops.
gravitySimulator is used to study the dynamical evolution of galaxies and galactic nuclei.