ATI announces it's ready for Microsoft Windows Vista with latest Catalyst'R' drivers

Coinciding with the release of Microsoft Windows Vista Release Candidate 1 (RC1), ATI (TSX: ATY)(NASDAQ: ATYT) announced that it is ready for the forthcoming public launch of Microsoft Corp.'s operating system, as demonstrated by new Catalyst® drivers available now. ATI's latest drivers for Windows Vista improve on the leading stability and performance found in previous versions, and introduce new features such as ATI's Powerplay(TM) power management technology for improved battery life for mobile platforms. When combined with ATI's graphics processors, ATI's drivers enable the fullest possible experience today for Windows Vista(1).

"With today's release, ATI is demonstrating that its graphics hardware and software are ready to provide the best experience possible for users of Windows Vista," said Mike Sievert, corporate vice president for Windows Client Marketing at Microsoft. "ATI has played an important role to ensure the public can take advantage of extremely stable, feature-rich, high performance drivers that showcase the capabilities of Windows Vista."

"ATI continues to introduce shipping-caliber drivers for Windows Vista that improve on the stability, performance and feature set of versions past," said Ben Bar-Haim, vice president of Software Engineering, ATI Technologies. "The quality of ATI's drivers ensure that upon the release of Windows Vista, OEMs, system integrators, businesses and consumers can take advantage of the best experience Windows Vista has to offer."

ATI's Windows Display Driver Model (WDDM) drivers continue to deliver exceptional stability and performance in Windows Vista. Using ATI drivers, the full 3D functionality of the Windows Vista desktop user interface known as Windows Aero is unlocked(2). The new drivers also enable features such as ATI's Powerplay(TM) power management technology, designed to optimize battery life for mobile platforms by automatically adjusting the balance between performance and power consumption based on the workload at hand.

ATI's latest Catalyst drivers for Microsoft Windows Vista are available for download from the ATI website at www.ati.com .

About ATI Technologies

ATI Technologies Inc. is a world leader in the design and manufacture of innovative 3D graphics, PC platform technologies 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 fiscal 2005 revenues of US $2.22 billion, ATI has more than 3,700 employees in the Americas, Europe and Asia. ATI common shares trade on NASDAQ (ATYT) and the Toronto Stock Exchange (ATY).

Important Information Regarding Forward-looking Statements

Certain statements in this news release, including but not limited to the features, performance and availability of CrossFire may be considered "forward-looking". Such forward-looking statements are based on current expectations, and, accordingly, entail various risks and uncertainties. Risks that could cause actual results to differ materially from such forward-looking statements include potential software or hardware-related issues or conflicts, the development of new products or technologies, overall system performance and other unforeseen risks. We therefore cannot provide any assurance that such forward-looking statements will materialize. We assume no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or any other reason. Additional information concerning risks and uncertainties affecting our business and other factors that could cause actual results to differ materially from any forward-looking statement is contained in our filings with Canadian and U.S. securities regulatory authorities, including our 2005 Annual Information Form and 2005 Annual Report filed on SEDAR at www.sedar.com . Our Form 40-F and other filings we make with the U.S. Securities and Exchange Commission are available on EDGAR at www.sec.gov .

Copyright 2006 ATI Technologies Inc. All rights reserved. ATI and ATI product and product feature names are trademarks and/or registered trademarks of ATI Technologies Inc. All other company and product names are trademarks and/or registered trademarks of their respective owners. Features, pricing, availability and specifications are subject to change without notice.

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(1) Refers to the functionality provided by the Windows Aero interface. Please see footnote #2.

(2) Functionality of the Windows Aero interface is dependent on the ATI graphics card you are using. Please consult the specs related to the graphics card you are using to ensure the full Aero experience is supported. On PCs configured to Microsoft Windows Vista(TM) Premium system requirements, certain ATI graphics cards support the Premium Windows Aero(TM) User Experience within: Windows Vista Ultimate, Windows Vista Home Premium, Windows Vista Business, Windows Vista Enterprise. Details at windowsvista.com/getready