Companies Build on Long Relationship to Address Needs of Oil and Gas Customers in Fast-Growing Market

HOUSTON, Texas and MOUNTAIN VIEW, Calif., (May 2, 2005)—Silicon Graphics (NYSE: SGI), and Landmark, a part of Halliburton's Digital and Consulting Solutions division (NYSE: HAL), today announced that Landmark will serve as a principal channel for SGI energy market solutions throughout Latin America.

The alliance addresses a unique opportunity in Latin America, one of the world's fastest-growing energy production markets. Under terms of a preferred partner alliance announced today, Landmark will be a primary customer touch point for both companies' oil and gas sales in Latin America. The agreement, which is effective immediately, builds on the two companies' long history of jointly delivering advanced interactive visualization solutions for seismic, drilling and reservoir analysis. As part of the agreement, SGI will transfer technical resources and expertise to Landmark's Latin American operations to provide continuity and capability for customers needs.

"Over the years, SGI and Landmark have developed a powerful synergy between their technologies and products, one that has driven key customer relationships within energy markets the world over," said Bob Bishop, chairman and CEO, SGI. "Working together to address the soaring needs of energy companies, we have jointly created solutions that play to our core strengths. With this new relationship, our clients can expect even stronger synergies in products and services that boost productivity and keep exploration costs down."

"To help sustain the world's energy needs, Latin America's leading oil and gas companies must continually find solutions whose capabilities expand with the demands of the task at hand," said Peter Bernard, president, Landmark Graphics. "Today and in the future, successful solutions must incorporate everything in the reservoir discovery and production workflow - from computing complex seismic imagery, massive subsurface reservoir simulations and visualizing the results to managing multiple terabytes of data that this work generates. Our expanded relationship with SGI will help make it easier than ever for energy customers to cost-effectively and efficiently achieve that level of capability when they need it."

Landmark Graphics
Landmark, part of Halliburton Digital and Consulting Solutions, is the leading supplier of software and services for the upstream oil and gas industry. The company's software solutions span exploration, production, drilling, business decision analysis and data management. Landmark offers a broad range of consulting services that enable customers to optimize their technical, business and decision processes. Visit the Landmark Web site at www.lgc.com for more information.

Halliburton is one of the world's largest providers of products and services to the petroleum and energy industries. The company serves its customers with a broad range of products and services through its Energy Services and Engineering and Construction Groups. The company's World Wide Web site can be accessed at www.halliburton.com.

SILICON GRAPHICS | The Source of Innovation and Discovery™
SGI, also known as Silicon Graphics, Inc. (NYSE: SGI), is a leader in high-performance computing, visualization and storage. SGI's vision is to provide technology that enables the most significant scientific and creative breakthroughs of the 21st century. Whether it's sharing images to aid in brain surgery, finding oil more efficiently, studying global climate, providing technologies for homeland security and defense or enabling the transition from analog to digital broadcasting, SGI is dedicated to addressing the next class of challenges for scientific, engineering and creative users. With offices worldwide, the company is headquartered in Mountain View, Calif., and can be found on the Web at www.sgi.com.

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This news release contains forward-looking statements regarding SGI technologies and third-party technologies that are subject to risks and uncertainties. These risks and uncertainties could cause actual results to differ materially from those described in such statements. The reader is cautioned not to rely unduly on these forward-looking statements, which are not a guarantee of future or current performance. Such risks and uncertainties include long-term program commitments, the performance of third parties, the sustained performance of current and future products, financing risks, the ability to integrate and support a complex technology solution involving multiple providers and users, and other risks detailed from time to time in the company's most recent SEC reports, including its reports on Form 10-K and Form 10-Q.