ATI Announces New Price-Performance Leader: Radeon'R' X1800 GTO.

MARKHAM, Ontario -- Featuring Advanced Gaming Performance at an Exceptional Value

ATI Technologies Inc. (TSX:ATY)(NASDAQ:ATYT) today announced the newest family member of the Radeon(R) X1800 series, the Radeon(R) X1800 GTO. Available from ATI's add-in-board partners by the end of the month at a suggested retail price of $249, the Radeon X1800 GTO delivers outstanding gaming performance that will dominate other graphics options in its price class.

With simultaneous support of high definition rendering (HDR) and anti-aliasing (AA)-functionality unique to ATI-the Radeon X1800 GTO is the ideal choice for those who want their games to look their best.

"ATI recognizes that there are gamers at every price point-and the Radeon X1800 GTO is a clear price-performance winner at $249," said Vijay Sharma, Director, Desktop Discrete Graphics, ATI. "The X1800 GTO is an important addition to the Radeon X1800 series further strengthening the mid-range market and giving users a powerful gaming card with a range of multimedia functions."

Featuring the same ultra-threaded shader architecture and revolutionary new memory architecture of ATI's award-winning Radeon X1800 XT and Radeon X1800 XL GPUs; the Radeon X1800 GTO rounds out the series at an unbeatable value-to-performance ratio. In addition, ATI's Avivo visual technology ensures the Radeon X1800 GTO delivers superior high definition video playback and image quality.

Radeon X1800 GTO has 12 pixel shader processors, a 256-bit GDDR3 memory interface and operates at 500 MHz core and 1000 MHz memory speeds-ensuring it has the performance headroom to support the most visually intensive games and applications today and well into the future. It will also ensure an exceptional experience with Microsoft's next-generation operating system, Windows Vista, when it launches later this year.

For more information about the Radeon X1800 GTO please visit. 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 3,400 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 price-performance characteristics of the Radeon X1800 and the launch of Microsoft's Windows Vista, may be considered "forward-looking". Such forward-looking statements are based on current expectations for pricing, user requirements and preferences, and the arrival of Windows Vista and, accordingly, entail various risks and uncertainties. Risks that could cause actual results to differ materially from such forward-looking statements include the potential for unforeseen hardware or software conflicts or issues, the impact and timing of new products or technologies, and competitive action based on price or other factors. 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. Adobe, Adobe Photoshop and Adobe Premiere are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and/or other countries.

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ATI Technologies Inc. (TSX:ATY) (NASDAQ:ATYT)