Author: Jeremiah Penery
Date: 16:37:48 07/08/03
Go up one level in this thread
On July 08, 2003 at 08:37:49, Vincent Diepeveen wrote: >On July 08, 2003 at 00:33:09, Jeremiah Penery wrote: > >>NEC Earth Simulator has 5120 NEC SX-7(?) vector processors. Total cost was less >>than $400m. > >around $680M it cost. Provide a reference for that $680m number, and I might believe you. I don't accept random numbers without reference. Less than $400m is quoted at these sites: http://www.mindfully.org/Technology/Supercomputer-Japanese23jul02.htm http://www.siliconvalley.com/mld/siliconvalley/news/editorial/3709294.htm http://www.time.com/time/2002/inventions/rob_earth.html http://www-zeuthen.desy.de/~schoene/unter_texte/texte/sc2002/tsld004.htm http://www.iht.com/articles/98820.html http://cospa.phys.ntu.edu.tw/aapps/v12n2/v12-2n1.pdf etc., etc. The highest price I've seen is around $500m, nowhere near your number. >>Here is a blurb about the chip, from the webpage: >> >>"Each AP consists of a 4-way super-scalar unit (SU), a vector unit (VU), and >>main memory access control unit on a single LSI chip. The AP operates at a clock >>frequency of 500MHz with some circuits operating at 1GHz. Each SU is a >>super-scalar processor with 64KB instruction caches, 64KB data caches, and 128 >>general-purpose scalar registers. Branch prediction, data prefetching and >>out-of-order instruction execution are all employed. Each VU has 72 vector >>registers, each of which can has 256 vector elements, along with 8 sets of six >>different types of vector pipelines: addition/shifting, multiplication, >>division, logical operations, masking, and load/store. The same type of vector >>pipelines works together by a single vector instruction and pipelines of >>different types can operate concurrently." >> >>Each chip consumes only about 140W, rather than Vincent's assertion of 150KW. > >the 125KW is for Cray 'processors' not fujitsu processors that are in the NEC >machine. > >Ask bob i remember he quoted 500 kilowatt for a 4 processor Cray. So i divided >that by 4. That 500KW was probably for the entire machine. Each processor probably consumes a very small amount of that. The Earth Simulator uses some 7MW of power in total, though only about 10% comes from the processors. >Trivially Cray machines using the opterons will be consuming less than that. >Note that the cpu costs is nothing compared to what the routers etc eat. Of course.
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.