SEATTLE, WA -- (Marketwire) -- 08/03/09 -- Global supercomputer leader Cray Inc. (NASDAQ: CRAY) today announced that the company has received a contract from the Department of Energy to upgrade the Cray XT5(TM) "Jaguar" supercomputer housed at the Oak Ridge National Laboratory. The upgrade to Six-Core AMD Opteron(TM) processors, code-named "Istanbul," will increase Jaguar's peak performance to more than two petaflops (quadrillion mathematical calculations per second) of compute power, solidifying its position as the world's most powerful supercomputer.

The contract to upgrade the Jaguar system will increase the number of the Cray XT5 supercomputer's processing cores to more than 224,000. The upgrade is expected to be installed and accepted by the end of 2009.

"What makes this upgrade to Jaguar truly exciting for us is the realization that the scientists and engineers using Jaguar will now have a faster and more powerful tool on their hands for achieving important scientific breakthroughs," said Peter Ungaro, president and CEO of Cray. "The Cray XT5 system at Oak Ridge remains the first and only supercomputer in the world to run real-world, scientific applications at over a sustained petaflops, and we are very proud of this groundbreaking achievement. When the upgrade is complete, this performance level will increase and the scientific community will benefit -- that is what matters most to us."

At the end of 2008, Jaguar was upgraded to a peak performance of 1.64 petaflops and set a historic milestone in surpassing the sustained petaflops speed barrier on two scientific applications. Sustained performance is a critical measure in supercomputing and allows scientists and engineers to dramatically increase the size, realism and complexity of simulations used to address fundamental scientific problems. For example, climate scientists are using Jaguar to create climate models of unprecedented resolution and fidelity, giving us a better understanding of future climate and our impact on that climate.

About Cray Inc.

As a global leader in supercomputing, Cray provides highly advanced supercomputers and world-class services and support to government, industry and academia. Cray technology enables scientists and engineers to achieve remarkable breakthroughs by accelerating performance, improving efficiency and extending the capabilities of their most demanding applications. Cray's Adaptive Supercomputing vision will result in innovative next-generation products that integrate diverse processing technologies into a unified architecture, allowing customers to surpass today's limitations and meeting the market's continued demand for realized performance. Go to www.cray.com for more information.

Safe Harbor Statement

This press release contains forward-looking statements. There are certain factors that could cause Cray's execution to differ materially from those anticipated by the statements above, including the technical challenges of developing high performance computing systems; the successful passing of acceptance tests; significant reliance on third-party development service and parts suppliers, including their competitiveness with other suppliers and potential delays in the results of their development and in the availability of qualified parts from suppliers; and Cray's ability to keep up with rapid technological change. For a discussion of these and other risks, see "Risk Factors" in Cray's most recent Quarterly Report on Form 10-Q filed with the SEC.

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