Author: Andrew Williams
Date: 04:21:28 07/27/00
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On July 26, 2000 at 18:04:58, Robert Hyatt wrote: >On July 26, 2000 at 17:22:38, Tom Kerrigan wrote: > >>On July 26, 2000 at 14:55:04, Robert Hyatt wrote: >> [LARGE SNIP] >> >>In fact, it's directly contradicted by two articles. One article says 200M NPS. >>The other article says 277M to 555M NPS. Even the IBM web site says 100M, and >>you'd think it would have the most optimistic number. > > >It has the DB1 number, for reasons unknown. IE it appears (to me) that >perhaps someone started to update it, but never finished, leaving old and >new numbers mixed up horribly. > I've snipped a lot of the "debate" because I don't believe it is worth repeating. However, I do have the IEEE article to hand here, so here is what Hsu said. === QUOTE FROM IEEE ARTICLE STARTS === "The chess chips provided enormous computational power. On a general-purpose computer, the computation done by the chess chip for a single chess position requires up to 40000 general-purpose instructions. At 2 to 2.5 million chess positions/s, one chess chip operates at the equivalent of a 100-billion- instructions/s supercomputer. Because this speed was adequate, I did not spend much time optimizing speed." [IRRELEVANT REFERENCE TO A DIAGRAM SNIPPED] "The 1997 version of Deep Blue included 480 chess chips. Since each chess chip could search 2 to 2.5 million chess positions/s, the "guaranteed not to exceed" system speed reached one billion chess positions per second, or 40 tera operations. This assumes that, on average, each chess position needs 40000 general purpose instructions to process. The sustained speed reached 200 million chess positions/s, or about 8 tera operations." === QUOTE FROM IEEE ARTICLE ENDS === I think it's possible to find most of the figures that have been used in the discussion here in the snippet I have quoted. The reference for this article is: Feng-hsiung Hsu, "IBM's Deep Blue Chess Grandmaster Chips", IEEE Micro, March-April 1999, pages 70-81 Andrew Williams
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