TSMC in volume production of 90nm graphics chips for ATI

MARKHAM, Ontario & TAIPEI, Taiwan. -- Sept. 20, 2005--ATI Technologies, Inc. (TSX:ATY)(NASDAQ:ATYT) and TSMC (TAIEX:2330)(NYSE:TSM) have announced that TSMC is in volume production of multiple 90 nanometer (nm) products for ATI, including the Radeon® X1800, Radeon® X1600 and Radeon® X1300 series chips, and has shipped large quantities of production wafers to ATI. "The ATI products produced with TSMC's 90nm process show a tremendous clock speed improvement and power reduction versus earlier generation technologies," said Jason Chen, Vice President of Corporate Development for TSMC. "As a result, TSMC is currently processing thousands of 300mm wafers for ATI, with many more already delivered. At this aggressive pace, ATI has already become one of our major 90nm customers." "TSMC has done an excellent job of delivering on yields and speeds," said Rick Bergman, Senior Vice President of ATI's PC Business Unit. "As ever, they've proven themselves an excellent manufacturing partner as we ramp up some of the most advanced technology consumers have ever seen." TSMC's state-of-the-art 90nm technology frees ATI from the limitations of less-advanced processes and enables a whole new level of performance and functionality for PC graphics. For example, the new ATI products have clock speeds around 50 per cent higher than products manufactured on older processes. ATI expects the latest cards to begin arriving on store shelves by the end of September.

About TSMC

TSMC is the world's largest dedicated semiconductor foundry, providing the industry's leading process technology and the foundry industry's largest portfolio of process-proven library, IP, design tools and reference flows. The company operates two advanced twelve-inch wafer fabs, five eight-inch fabs and one six-inch wafer fab. TSMC also has substantial capacity commitments at its wholly-owned subsidiary, WaferTech and TSMC (Shanghai), and its joint venture fab, SSMC. TSMC's corporate headquarters are in Hsinchu, Taiwan. For more information about TSMC please see http://www.tsmc.com.

About ATI Technologies

ATI Technologies Inc. is a world leader in the design and manufacture of innovative 3D graphics and digital media silicon solutions. An industry pioneer since 1985, ATI is the world's foremost graphics processor unit (GPU) provider and is dedicated to deliver leading-edge performance solutions for the full range of PC and Mac desktop and notebook platforms, workstation, set-top and digital television, game console and handheld device markets. With 2004 revenues of US $2 billion, ATI has more than 2,700 employees in the Americas, Europe and Asia. ATI common shares trade on NASDAQ (ATYT) and the Toronto Stock Exchange (ATY).