Leading graphics technology powers most anticipated PC game of the Year

MARKHAM, Ontario - May 9, 2003 - ATI Technologies Inc. (TSX: ATY, NASDAQ: ATYT), leading graphics technology provider, and Valve®, creators of Half-Life®, Counter-StrikeTM and other award-winning PC action games, today announced the first public showing of Valve's Half-Life 2 will take place at next week's Electronic Entertainment Expo in Los Angeles, CA. The product will be shown on ATI's RADEON 9800 PRO 256MB, the highest performance 3D card currently available, in a state of the art theater located in ATI's booth (South Hall, 646).

Half-Life 2, published by Vivendi Universal Games, will be demonstrated by Gabe Newell, Valve's co-founder and Managing Director, every half-hour. The original Half-Life was launched to tremendous reviews in 1998, won over 50 "Game of the year" awards worldwide, and launched a franchise with over 8 million units sold.

"Half-Life 2 is pushing the envelope with contextual AI, simulated physics, characters that rival any digital actors in Hollywood, and advanced rendering capabilities," said Newell. "When we reviewed all the platforms available for use in the public unveiling of HL2, ATI's RADEON 9800 PRO was unquestionably the choice for showing Half-Life 2 at its best."

"This is the most significant game of 2003," said Rick Bergman, General Manager Desktop and Senior Vice President, Marketing, at ATI Technologies Inc. "Half-Life 2 will be huge, and the amazing technology Valve has put into the game engine means we'll see a tidal wave of gorgeous-looking products from Valve and others, such as Troika, who chose Valve SourceTM technology as the base for their next generation products."

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 visual processor unit (VPU) 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 markets. With 2002 revenues in excess of US $1 billion, ATI has more than 1,900 employees in the Americas, Europe and Asia. ATI common shares trade on NASDAQ (ATYT) and the Toronto Stock Exchange (ATY).

About Valve
Founded in 1996, Valve creates entertainment software titles, including Half-Life®, Counter-StrikeTM, and Team Fortress®. Valve's portfolio accounts for over 8 million retail units sold worldwide, and over 88% of the online action market. More information about Valve is available through the company's Web site at http://www.valvesoftware.com