Elpida Introduces the World's Fastest DRAM Based on the Rambus XDR Memory Architecture

Elpida Memory, Inc. (Elpida) (Tokyo Stock Exchange Code 6665),
Japan's leading global supplier of Dynamic Random Access Memory (DRAM)
and Rambus Inc. (Nasdaq:RMBS), one of the world's premier technology
licensing companies specializing in high-speed chip architectures,
today introduced the industry's fastest DRAM, the 512 Megabit (Mb),
4.8GHz XDR(TM) DRAM, based on Rambus' XDR memory architecture. This
latest addition to the XDR DRAM family provides an industry-leading
data transfer rate of 9.6 Gigabytes per second (GB/s) with a single
device, making it an ideal choice for high-performance, high-volume
applications such as high-definition televisions (HDTV), gaming
consoles, PCs, servers and workstations.

"The industry's demand for memory bandwidth in next-generation
products is growing rapidly as high-definition image data becomes more
popular," said Yoshitaka Kinoshita, officer for the Digital Consumer
Division of Elpida Memory, Inc. "Working with Rambus on XDR DRAM, we
can provide the most cost-effective, high-bandwidth memory solution to
our customers."

Elpida's 512Mb, 4.8GHz XDR DRAM (Part number: EDX5116ADSE-5E-E)
device is organized in 8-banks (x16/x8/x4 programmable), and with a
9.6GB/s data transfer rate delivers six times the peak bandwidth of
industry-standard DDR2-800 memory devices. The 4.8GHz XDR device is
manufactured using Elpida's 70 nm process technology and is available
in a 104-ball FBGA package. To support both high-speed and robust data
transfer, XDR DRAM utilizes key enabling technologies built on
patented Rambus innovations such as Differential Rambus Signaling
Level (DRSL), which minimizes signal swing and noise; Octal Data Rate
(ODR) technology which transfers eight bits of data on each clock
cycle to achieve 4.8GHz operation with just a 600MHz clock; and
FlexPhase(TM) circuit technology for precise on-chip data alignment
with the clock. The 512Mb XDR DRAM device also features adaptive
impedance matching, dynamic request scheduling and zero overhead
refresh.

"Elpida's 4.8GHz XDR DRAM is an excellent fit for consumer
electronics applications requiring high bandwidth for 3-D graphics,
high-definition image processing, and advanced multimedia," said
Sharon Holt, senior vice president of worldwide sales, licensing and
marketing at Rambus. "Elpida is well established as a leading XDR DRAM
supplier and we are proud to work with them to advance the roadmap for
XDR to 4.8GHz, achieving the world's fastest DRAM."

XDR DRAM is an integral part of the XDR memory architecture,
working 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. A single XDR DRAM device operating in x16 mode
achieves a data transfer rate of 9.6GB/s. In comparison, it requires
six DDR2-800 x16 devices to achieve an equivalent data rate.

Proven in high-volume applications, Rambus XDR memory solutions
are backed by comprehensive engineering support services that range
from chip design to system integration. XDR DRAM continues to provide
an order of magnitude higher performance than today's standard
memories. For more information on the XDR memory architecture, as well
as the next-generation XDR2 DRAM with micro-threading, please visit
www.rambus.com/xdr.

Availability

Elpida's 512Mb 4.8GHz XDR DRAM devices (Part number:
EDX5116ADSE-5E-E) will be available for sampling in December 2007.
Volume production is expected to begin in April 2008. A datasheet is
available upon request.

About Elpida Memory, Inc.

Elpida Memory, Inc., (Tokyo Stock Exchange Code 6665), is a
leading manufacturer of Dynamic Random Access Memory (DRAM) silicon
chips. Our design, manufacturing, and sales operations are backed by
our world class technology expertise. Our manufacturing facilities,
Hiroshima Elpida Memory, Inc. (front-end processes) and Akita Elpida
Memory, Inc. (back-end processes), utilize the most advanced
manufacturing technologies available in the industry. Further, we have
customer sales and marketing support offices in Japan, North America,
Europe, Taiwan, Hong Kong and Singapore. Elpida's portfolio of
advanced products features such characteristics as high-density,
high-speed, low power and small packing profiles. We provide
applications across a wide range of areas, including high-end servers,
mobile phones and digital consumer electronics. For more information
about Elpida, please visit http://www.elpida.com.

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.

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