Rambus announces its customers have shipped more than 500 million memory devices

RDRAM Enables over 100 Million Consumer, Computing and Communications Systems and Products

LOS ALTOS, Calif.--(BUSINESS WIRE) -- March 23, 2005 -- Rambus Inc. (Nasdaq:RMBS), one of the world's premier technology licensing companies specializing in high-speed chip interfaces, today announced its customers have shipped more than 500 million memory devices(1) incorporating the Rambus RDRAM(R) memory interface. RDRAM memory devices can be found in over 100 million consumer, computing and communications systems and products shipped since the introduction of RDRAM in 1997 and are currently shipping in applications ranging from game consoles and high definition televisions to Internet routers.

RDRAM, operating at data rates up to 1600MHz, has been the highest performance memory solution available on the market for many years. Now Rambus has pushed DRAM performance to a new level with its next-generation memory interface technology which is incorporated in XDR(TM) DRAM memory devices. XDR DRAMs operate at data rates ranging from 3.2GHz to 8.0GHz.

"This milestone confirms the competitive advantage our customers derive from the exceptional system performance provided by Rambus memory interface solutions," said Laura Stark, vice president of Platform Solutions at Rambus. "The success our customers have enjoyed with RDRAM makes for a natural transition to our newest XDR memory interface solution."

Rambus has licensed its RDRAM and XDR memory interfaces to some of the world's largest chip and system providers. Samsung recently announced it is entering into volume production of XDR DRAM to support multimedia applications. In addition to Samsung, Elpida and Toshiba have licensed the XDR memory interface for incorporation into DRAMs, and Panasonic has licensed the XDR memory interface for use with future consumer electronics controller chips.

Earlier this year, Sony, Toshiba and IBM revealed that the much-anticipated Cell processor will incorporate the XDR memory interface. XDR memory, along with Rambus's FlexIO(TM) processor bus solution, provides the Cell processor with approximately 100 gigabytes-per-second of aggregate bandwidth, bringing unprecedented I/O performance to the most demanding of applications.

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

Note: (1) Memory devices in 128Mb equivalent units