Industry Ships 25 Million XDR DRAM Memory Devices

XDR DRAM enables unprecedented performance in high-volume and cost-sensitive systems

Los Altos, California, United States  -- June 11,2007 --  Rambus Inc. (NASDAQ:RMBS), one of the world’s premier technology licensing companies specializing in high-speed chip architectures, today announced that its customers have shipped over 25 million XDR™ DRAM (extreme data rate dynamic random access memory) devices worldwide. Designed for both high-bandwidth and cost-sensitive systems, XDR DRAM and the XDR memory architecture are ideally suited for graphics processing, consumer electronics, network and server applications, as well as a new generation of compute platforms driven by multi-core processors. XDR DRAM is the high-performance memory solution in Sony’s breakthrough PLAYSTATION®3 (PS3™) computer entertainment system.

According to Nam Kim, research director at iSuppli Corporation, “The XDR memory architecture with its underlying inventions is a key element in creating the rich graphics seen in the Sony PS3 and could lend itself to future graphics-intensive applications such as HDTV.”

The XDR memory architecture operating at 4.0GHz provides an unmatched 8.0 GB/s of peak memory bandwidth with a single, 2-byte wide XDR DRAM. XDR DRAM works seamlessly with the XDR Memory Controller (XMC), XDR IO controller interface cell (XIO), and the XDR Clock Generator (XCG) to enable unprecedented levels of memory performance while utilizing the fewest number of ICs. With a roadmap extending to 8.0GHz providing 16.0 GB/s of bandwidth per device, XDR DRAM continues to provide an order of magnitude higher performance than today's standard memories.

“The market is demanding higher performance memory solutions to satisfy the needs of multi-core processing and other compute-intensive applications,” said Sharon Holt, senior vice president of Sales, Licensing, and Marketing at Rambus. “The XDR memory architecture, coupled with our engineering services, gives our customers a competitive advantage in both performance and time-to-market.”

The XDR memory architecture features key enabling technologies built on patented Rambus innovations that include low-voltage, low-power Differential Rambus Signaling Level (DRSL); Octal Data Rate (ODR) technology that transfers eight bits of data each clock cycle; FlexPhase™ circuit technology for precise on-chip alignment of data with clock; and Dynamic-Point-to-Point (DPP) for both enhanced signal integrity and scalability.

Proven in high-volume and cost-competitive applications, Rambus solutions are backed by comprehensive engineering support services that range from chip design to system integration, and can scale for future cost reduction. For more information on the XDR memory architecture, as well as the next generation of XDR, the 8GHz XDR2 DRAM with patented micro-threading, please visit www.rambus.com/xdr. XDR DRAM licensees include Elpida Memory Inc., Qimonda AG, and Samsung Electronics Co. Ltd.

About Rambus Inc.

Rambus is one of the world's premier technology licensing companies specializing in the invention and design of high-speed chip architectures. Since its founding in 1990, the Company's patented innovations, breakthrough technologies and renowned integration expertise have helped industry-leading chip and system companies bring superior products to market. Rambus' technology and products solve customers' most complex chip and system-level interface challenges enabling unprecedented performance in computing, communications and consumer electronics applications. Rambus licenses both its world-class patent portfolio as well as its family of leadership and industry-standard interface products. Headquartered in Los Altos, California, Rambus has regional offices in North Carolina, India, Germany, Japan, Korea and Taiwan. Additional information is available at www.rambus.com.