Rambus today revealed that the Cell processor incorporates Rambus’s XDR memory and FlexIO(TM) processor bus interface solutions. The memory and processor bus interfaces designed by Rambus account for 90% of the Cell processor signal pins, providing an unprecedented aggregate processor I/O bandwidth of approximately 100 gigabytes-per-second. The Rambus XDR memory interface, capable of data rates of 3.2GHz to 8.0GHz, achieves data rate speeds that are an order of magnitude higher than today’s mainstream PC memory systems while utilizing fewer DRAMs and fewer controller pins. FlexIO processor buses, formerly codenamed Redwood, are capable of running up to 6.4GHz data rates providing bandwidth more than four times faster than best-of-class processor buses available today. All Rambus high-speed interfaces are developed as complete solutions for high-volume, low-cost systems.

Rambus Inc., a leading developer of chip interface products and services,
today revealed that the Cell processor incorporates Rambus’s XDR memory and
FlexIO(TM) processor bus interface solutions. Cell is the highly-anticipated
advanced microprocessor developed by Sony Corporation, Sony Computer
Entertainment, Toshiba Corporation and IBM. The memory and processor bus
interfaces designed by Rambus account for 90% of the Cell processor signal pins,
providing an unprecedented aggregate processor I/O bandwidth of approximately
100 gigabytes-per-second.

Rambus is scheduled to discuss the Cell interface clocking and circuit design
at the International Solid State Circuits Society conference in San Francisco on
February 9, 2005.

"The Cell processor, that has overwhelming computational power, demands another
overwhelming data transfer capability between Cell and main memory system, and
Input/Output systems. Rambus, underpinned by its expertise in latest memory
technology, provided us with a clear solution that was absolutely the best match
to Cell," said Ken Kutaragi, executive deputy president and COO, Sony
Corporation, and president and Group CEO, Sony Computer Entertainment Inc. "I
respect Rambus and all our team members that collaborated together for
completing this challenging work with all the technology and enthusiasm they
possess."

"We have been busy working with the Sony Group and Toshiba on the development of
the Cell processor for the past couple of years and we’re excited to see this
advanced engineering effort become a reality," said Harold Hughes, chief
executive officer at Rambus. "Our engineering teams have not only designed and
developed the world’s fastest memory and logic interfaces but we continue to
help our customers integrate various system components which enable them to
bring high-performance, high-value products to the market."

The Rambus XDR memory interface, capable of data rates of 3.2GHz to 8.0GHz,
achieves data rate speeds that are an order of magnitude higher than today’s
mainstream PC memory systems while utilizing fewer DRAMs and fewer controller
pins. FlexIO processor buses, formerly codenamed Redwood, are capable of running
up to 6.4GHz data rates providing bandwidth more than four times faster than
best-of-class processor buses available today. All Rambus high-speed interfaces
are developed as complete solutions for high-volume, low-cost systems.

Sony and Toshiba signed a licensing agreement with Rambus in January 2003. Since
then the engineering teams have worked closely to design and develop the
high-bandwidth interface solutions necessary for next-generation computing and
consumer devices.