Cray Machine Families

Cray-2 Diagnostic and indicator lights

If you look closely into the top of a Cray-2 we are able to make out rows of indicator lights that were used by service engineers to assess the state of a machine. In the event that a machine hung or unexpectedly halted, the indicator lights were examined to gain some idea of what was

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Cray X1 Cpu module Teardown

The Cray X1 (also also known as the SV2 ) had a very innovative cooling method. A multichip module is mounted in a metal shell inside which four sprayheads delivere cooling liquid directly to the module face. Inside the sealed module the coolant to undergo a partial phase change extracting heat directly from the chips.

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Interesting TV Program from 1987 – Cray-2 Cray-1 and Cray XMP can be seen in working environments

This interesting TV Program from 1987 The Computer Chronicles – Super Computers Episode  Has information about NASA Ames Cray-2 and Los Alamos C1 & XMP. Shows the systems in there working environment along with explanations as to how the Cray systems are advancing science. About 30 Minutes – First part on NAS Ames Cray 2 then onto

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Cray-1 Simulators via HASE and Electronics

The HASE Cray-1 Simulation Model is available here  “Simulation models of a variety of computer architectures and architectural components have been created using HASE, a Hierarchical Computer Architecture design and Simulation Environment. These models are intended for use as teaching and learning resources: in lectures, for student self-learning or for virtual laboratory experiments. Using the models requires

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SN13 Recollections By Charles Clark

From: Charles Clark <*******@gmail.com> Subject: Re: Meeting on 7th October Date: 3 January 2022 at 16:15:48 GMT To: DCLaufer <davidl@*******> Cc: Clive England <clive@********> David, Clive just sent me the recording of our virtual visit to the CMoA in October and since you talked again about  S/N 13, your Cray 1 from Max Planck, I

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About the Musée Bolo

Musée Bolo Located in Lausanne Switzerland This museum has the Cray machines that were previously in service at site EPFL. Including a Cray-1, Cray-XMP, Cray-2, T3D and XT4. These photos from an exhibition in 2022 after the restoration using materials from the original maker Naugahyde. “The Cray X-MP/48, once used at CERN, as well as the

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Archer 2 now fastest computer in Europe at EPCC

EPCC have announced the commissioning into production of Archer-2 with a visit form the prime minister. UK’s most powerful supercomputer on show for Prime Minister 14 February 2022 Prime Minister Boris Johnson has visited the UK’s newest and most powerful supercomputer ARCHER2 during a tour of the University’s world-class data centre facilities. The cutting-edge system

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Fifty years of Cray supercomputers in 2022

Fifty years of Cray supercomputers was celebrated with a virtual tour hosted by TNMOC in UK on 6th April 2022 This virtual talk explored the physical and logical structure of Cray-1  SN34, peaking ‘under the covers’ of this remarkable machine. The talk also illuminates how these machines evolved and sample some of what was achieved

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Supercomputers going cheep ( too cheep ? ) 1997

The end of the ’90s was tough few years for supercomputers. These articles describe the spat that broke out between Cray and NEC a Japanese firms that was accused of selling supercomputers at less than cost price. After the spat was settled Cray entered an agreement to resell NEC supers SX-5 & SX-6 into the

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NCAR / UCAR a research site with a long association with Cray supercomputers.

The National Centre for Atmospheric Research NCAR/UCAR in Colorado has a long association with Cray supercomputers. Starting in 1977 with the Cray-1 SN3 the site invested in some the best supercomputers available.  More recently a Cray Petaflop class machines will be used to explore climate research. In 2024 the site has commissioned Derecho a 19

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Florida State University replace ETA-10 with Cray YMP from 1991 by Jeff Bauer

Also seen at – http://ed-thelen.org/comp-hist/super-users-view.html A History of Supercomputing at Florida State University Jeff Bauer (Written in early 1991) As the result of an unsolicited proposal by the Florida State University (FSU) to the U. S. Department of Energy (DOE), a collaborative agreement was initiated in late 1984 between the State of Florida, FSU, DOE

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Delayed delivery obsoleted a Cray XMP-EA SN1205 before delivery.

This cautionary tale of how a USD10 million Cray machine was built but never delivered due to regulatory delay. Turns out it was not super-computers but more likely to be a rogue scientist that let the nuke secrets out the flask. From Wikipedia:  “In 2004, the Pakistani metallurgist Abdul Qadeer Khan, a key figure in

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