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System X (computing)
System X (pronounced ''"System Ten"'') was a supercomputer assembled by Virginia Tech's Advanced Research Computing facility in the summer of 2003. Costing US$5.2 million, it was originally composed of 1,100 Apple Power Mac G5 computers〔Varadarajan, S. ''System X: building the Virginia Tech supercomputer '' in Proceedings. 13th International Conference on Computer Communications and Networks, 2004. ICCCN 2004. ISBN 0-7803-8814-3〕 with dual 2.0 GHz processors.〔 System X was decommissioned on May 21, 2012.
System X ran at 12.25 Teraflops, (20.24 peak), and was ranked #3 on November 16, 2003 and #280 in the July 2008 edition of the TOP500 list of the world's most powerful supercomputers. The system used error-correcting RAM, which is important for accuracy due to the rate of bits flipped by cosmic rays or other interference sources in its vast number of RAM chips.
== Background ==
The supercomputer's name originates from the use of the Mac OS X operating system for each node, and because it was the first university computer to achieve 10 teraflops on the high performance LINPACK benchmark. The supercomputer is also known as ''‘Big Mac’'' or ''‘Terascale Cluster’''. In 2003 it was also touted as “the world’s most powerful and cheapest homebuilt supercomputer.”〔 System X was constructed with a relatively low budget of just $5.2 million, in the span of only three months, thanks in large part to using off-the-shelf Power Mac G5 computers. By comparison, the Earth Simulator, the fastest supercomputer at the time, cost approximately $400 million to build.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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