MARKHAM, ON/ Munich, Germany - January 27, 2005 - New Mercury Research market share numbers released today for Q4 2004 show ATI Technologies Inc. (TSX: ATY, NASDAQ:ATYT) was the world's largest discrete graphics supplier in 2004. ATI continues to move forward with six sequential quarters of year over year growth - shipping over half of the world's discrete graphics.

"With a virtual clean sweep of OEM PCI Express designs on desktop and notebook PCs, ATI continues to lead the market for discrete graphics," said Rick Bergman, Senior Vice President, PC Business Unit, ATI Technologies. "In addition, we've ramped volume production of the RADEON® X800XL and RADEON® X850 series to put ATI in the best position to increase performance and market share leadership for high-end DirectX 9 graphics processors."

About ATI Technologies
ATI Technologies Inc. is the 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 delivering 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).

Copyright 2004 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.

For media or industry analyst support, visit our Web site at http://www.ati.com