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IBM ASCI White is a supercomputer at the Lawrence Livermore National Laboratory in California.

It is a computer cluster based on IBM's commercial RS/6000 SP computer, 512 of these machines are connected together for ASCI White, with 16 processors a node and 8,192 processors in total with 6 Terabytes of memory and 160 Terabytes of disk storage. The computer weighs 106 tons and consumes 3 MW of electricity with a further 3 MW needed for cooling. It has a theoretical processing speed of 7,226 GFLOPS. As it is was made by IBM it runs their AIX operating system.

ASCI White is made up of three individual systems, the 512 node White, the 28 node Ice and the 68 node Frost.

The system was built in Poughkeepsie, New York. Completed in June 2000 it was transported to specially built facilities in California and officially dedicated on August 15, 2001. Claimed performance was 12,300 GFLOPS, although this was not achieved in the widely accepted Linpack[?] tests. The system cost $110 million.

It was built as stage three of the Accelerated Strategic Computing Initiative[?] (ASCI) started by the U.S. Department of Energy and the National Nuclear Security Administration[?] to build a simulator to replace live nuclear weapon testing following the moratorium on testing started by President George H. W. Bush in 1992 and extended by Bill Clinton in 1993.

External Links

Advanced Simulation and Computing (ASCI) at Livermore (http://www.llnl.gov/asci/)

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