XDR(TM) DRAM Passes 50 Million Units Shipped Milestone

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 50 million
XDR(TM) DRAM devices worldwide.

The award-winning 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(TM) circuit technology for precise on-chip
alignment of data with clock; and Dynamic-Point-to-Point (DPP) for
both enhanced signal integrity and scalability.

"The demand for high-performance, cost-effective memory solutions
continues to grow dramatically," said Yoshitaka Kinoshita, officer for
the Digital Consumer Division of Elpida Memory, Inc. "Thanks to the
XDR memory architecture, Elpida can provide our customers superior
DRAM products enabling amazing new capabilities."

Proven in high-volume, cost-competitive applications, the XDR
memory architecture operating at 4.8Gbps provides an unmatched 9.6GB/s
of peak memory bandwidth with a single, 2-byte wide XDR DRAM. With a
roadmap extending to 8.0Gbps providing 16.0GB/s of bandwidth per
device, XDR DRAM provides an order of magnitude higher performance
than today´s standard memories. With XDR DRAM, designers can achieve
unprecedented performance with the fewest devices.

"The XDR memory architecture is an ideal solution for advanced
consumer and computing applications," said Sharon Holt, senior vice
president of worldwide sales, licensing and marketing at Rambus. "Our
complete XDR memory solution and comprehensive engineering services
minimize risk and help our customers bring breakthrough products to
market."

Recent milestones from XDR DRAM licensees include the October 2007
introduction of the industry´s fastest DRAM, the 512 Megabit (Mb),
4.8Gbps XDR DRAM by Elpida Memory Inc., providing an industry-leading
data transfer rate of 9.6 Gigabytes per second (GB/s) with a single
device. In addition, Qimonda AG has started shipping samples of its
512Mb XDR DRAM.

For more information on the XDR memory architecture please visit
www.rambus.com/xdr.

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.

(1) Winner of the International Engineering Consortium (IEC) 2008
DesignVision Award in the Semiconductors and ICs (IP) category. The
IEC DesignVision Awards recognize technologies, applications,
products, and services judged to be the most unique and beneficial to
the industry.

Rambus and the Rambus logo are registered trademarks of Rambus
Inc. XDR is a trademark of Rambus Inc. All other trade names are the
service marks, trademarks, or registered trademarks of their
respective owners.