Mentor Graphics Announces Product Certification for 64-Bit Red Hat Enterprise Linux Platform

WILSONVILLE, Ore., Sept. 1, 2005 - Mentor Graphics Corporation (Nasdaq: MENT) today announced its support for 64-bit Linux platforms by declaring full operational qualification for its analog/mixed-signal tool set. Mentor's entire line of Eldo{reg} and ADVance MS™ analog and mixed-signal products have been certified for operation on Opteron and EM64T processor architectures using the Red Hat Enterprise Linux 3 platform.

"Linux on X86-64 hardware is proving to be a great performance platform for our products," said Jue-Hsien Chern, vice president and general manager of Mentor's Deep Submicron Division. Mentor's AMS (Analog/Mixed-Signal) products and CICD (Custom IC Design) tools join Mentor's DFT tools (Design for Test), ModelSim{reg} and the Calibre design-to-silicon platform to offer customers a wide choice in 64-bit computing. The move to 64-bit processing will become more crucial as engineers begin to design at 65nm and below and populate each chip with millions of gates.

"Red Hat Enterprise Linux for 64-bit architectures delivers unbelievable performance at a great value, especially for compute-intensive workloads found in the EDA market," said Tim Yeaton, senior vice president of Marketing at Red Hat. "Red Hat is proud to partner with Mentor on this first-class solution for our mutual customers."

Mentor Graphics products are also available on Novell Linux SLES 9, Red Hat Enterprise Linux 3 for Xeon-64, and Opteron platforms.

About Eldo and ADVance MS Products

The Eldo simulator offers numerous simulation and modeling options that deliver high-performance and high-speed simulation with the accuracy required by the user. Eldo RF extends the Eldo transistor-level simulator to accommodate RF IC designs.

ADVance MS is a language-neutral mixed-signal simulator that enables top-down design and bottom-up verification of multi-million gate analog/mixed-signal System-on-Chip (SoC) designs. ADVance MS RF is an industry-leading tool for mixed-signal simulation.

About Mentor Graphics

Mentor Graphics Corporation (Nasdaq: MENT) is a world leader in electronic hardware and software design solutions, providing products, consulting services and award-winning support for the world's most successful electronics and semiconductor companies. Established in 1981, the company reported revenues over the last 12 months of about $700 million and employs approximately 3,900 people worldwide. Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777; Silicon Valley headquarters are located at 1001 Ridder Park Drive, San Jose, California 95131-2314. World Wide Web site: http://www.mentor.com/.

Mentor Graphics, ModelSim, Calibre and Eldo are registered trademarks, and ADVance MS is a trademark of Mentor Graphics Corporation. All other company or product names are the registered trademarks or trademarks of their respective owners.

For more information, please contact:

Carole Thurman
Mentor Graphics
503.685.4716
carole_thurman@mentor.com

Sonia Harrison
Mentor Graphics
503.685.1165
sonia_harrison@mentor.com