The Cray T90 series (code-named ''Triton'' during development) was the last of a line of

vector processing In computing, a vector processor or array processor is a central processing unit (CPU) that implements an instruction set where its instructions are designed to operate efficiently and effectively on large one-dimensional arrays of data called ...

supercomputer A supercomputer is a computer with a high level of performance as compared to a general-purpose computer. The performance of a supercomputer is commonly measured in floating-point operations per second ( FLOPS) instead of million instructions ...

s manufactured by

Cray Research Cray Inc., a subsidiary of Hewlett Packard Enterprise, is an American supercomputer manufacturer headquartered in Seattle, Washington. It also manufactures systems for data storage and analytics. Several Cray supercomputer systems are listed i ...

, Inc, superseding the

Cray C90 The Cray C90 series (initially named the Y-MP C90) was a vector processor supercomputer launched by Cray Research in 1991. The C90 was a development of the Cray Y-MP The Cray Y-MP was a supercomputer sold by Cray Research from 1988, and the su ...

series. The first machines were shipped in 1995, and featured a 2.2 ns (450 MHz) clock cycle and two-wide vector pipes, for a peak speed of 1.8 gigaflops per processor; the high clock speed arises from the CPUs being built using ECL logic. As with the Cray J90, each CPU contained a scalar

data cache A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory. A cache is a smaller, faster memory, located closer to a processor core, whi ...

, in addition to the instruction buffering/caching which has always been in Cray architectures. Configurations were available with between four and 32 processors, and with either

IEEE 754 The IEEE Standard for Floating-Point Arithmetic (IEEE 754) is a technical standard for floating-point arithmetic established in 1985 by the Institute of Electrical and Electronics Engineers (IEEE). The standard addressed many problems found i ...

or traditional Cray floating-point arithmetic; the processors shared an SRAM main memory of up to eight gigabytes, with a bandwidth of three 64-bit words per cycle per CPU (giving a 32-CPU STREAM bandwidth of 360 gigabytes per second). The clock signal is distributed via a fiber-optic harness to the processors. The T90 series was available in three variants, the T94 (one to four processors), T916 (eight to 16 processors) and T932 (16 to 32 processors). It is widely considered as being slightly ahead of the state of the art at the time it was shipped; the systems were never particularly reliable. At launch, a 32-processor T932 cost $35 million. Cray T90 systems were installed at, amongst other places, at least three US government sites, at NAVOCEANO in Mississippi (Bay St. Louis) USA, at NTT and

NIED The Nied (; ) is a river in Lorraine, France, and Saarland, Germany. It is a left tributary of the Saar. It is formed where two streams converge: the ''Nied allemande'' ("German Nied") and the ''Nied française'' ("French Nied"), which join in ...

in Japan, at the

Ford Motor Company Ford Motor Company (commonly known as Ford) is an American multinational automobile manufacturer headquartered in Dearborn, Michigan, United States. It was founded by Henry Ford and incorporated on June 16, 1903. The company sells automobi ...

and at

General Motors The General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. It is the largest automaker in the United States and ...

, at

NOAA The National Oceanic and Atmospheric Administration (abbreviated as NOAA ) is an United States scientific and regulatory agency within the United States Department of Commerce that forecasts weather, monitors oceanic and atmospheric conditio ...

Geophysical Fluid Dynamics Laboratory The Geophysical Fluid Dynamics Laboratory (GFDL) is a laboratory in the National Oceanic and Atmospheric Administration (NOAA) Office of Oceanic and Atmospheric Research (OAR). The current director is Dr. Venkatachalam Ramaswamy. It is one of se ...

, at

Forschungszentrum Jülich Forschungszentrum Jülich (FZJ here for short) is a national research institution that pursues interdisciplinary research in the fields of energy, information, and bioeconomy. It operates research infrastructures with a focus on supercomputers. Cu ...

in Germany, and at the

Commissariat à l'Energie Atomique A commissariat is a department or organization commanded by a commissary or by a corps of commissaries. In many countries, commissary is a police rank. In those countries, a commissariat is a police station commanded by a commissary. In some ...

in France. The system chassis weighs , contains of

fluorinert Fluorinert is the trademarked brand name for the line of electronics coolant liquids sold commercially by 3M. As perfluorinated compounds (PFCs), all Fluorinert variants have an extremely high Global Warming Potential (GWP), so should be used wit ...

coolant, and is approximately the shape and size of a very large chest freezer, paneled in black and gold plastic. Its successor, some years after the last T90s shipped, was the

Cray X1 The Cray X1 is a non-uniform memory access, vector processor supercomputer manufactured and sold by Cray Inc. since 2003. The X1 is often described as the unification of the Cray T90, Cray SV1, and Cray T3E architectures into a single machine. T ...

References

External links

Top 500 Supercomputer sites
(PDF) {{Cray computers Computer-related introductions in 1995 T90 Vector supercomputers