Rambus Names Dr. Mark Horowitz Chief Scientist

Los Altos, CA - May 24, 2005 –   Rambus Inc. (Nasdaq:RMBS), one of the world's premier technology licensing companies specializing in high-speed chip interfaces, today announced that Dr. Mark Horowitz, a company co-founder and high-speed signaling expert, has been named Chief Scientist. In his new position, Horowitz will report directly to Harold Hughes, Rambus's president and CEO.

Prior to being named Chief Scientist, Horowitz served as director and also served as vice president from 1990 - 1994. As Chief Scientist, Horowitz will be responsible for assembling teams to evaluate trends and look for opportunities to apply Rambus's high-speed signaling expertise to various markets. He will take an active leadership role in determining Rambus's future technological development and direction. Dr. Horowitz, along with Dr. Michael Farmwald, founded Rambus in 1990. Dr. Horowitz has taught at Stanford University since 1984 where he is currently a professor of Electrical Engineering and Computer Science.

"Since Rambus's founding, Mark has been the inspiration behind many of the company's significant technical breakthroughs," said Harold Hughes, president and CEO at Rambus. "Mark's vision and ability to identify major technology trends have helped make Rambus the leader in advanced high-speed signaling."

Dr. Horowitz holds B.S. and M.S. degrees in Electrical Engineering from the Massachusetts Institute of Technology and received his Ph.D. in Electrical Engineering from Stanford University.

About Rambus Inc.

Rambus is one of the world's premier technology licensing companies specializing in the invention and design of high-speed chip interfaces. Since its founding in 1990, the company?s innovations, breakthrough technologies and integration expertise have helped industry-leading chip and system companies solve their most challenging and complex I/O problems and bring their products to market. Rambus's interface solutions can be found in numerous computing, consumer, and communications products and applications. Rambus is headquartered in Los Altos, Calif., with regional offices in Chapel Hill, North Carolina; Bangalore, India; Taipei, Taiwan; and Tokyo, Japan. Additional information is available at www.rambus.com.