The European Commission imposed a record 1.06 billion euros ($1.45 billion) fine on chipmaker Intel Corp on Wednesday and ordered it halt illegal rebates and other practices to squeeze out rival AMD.

Intel has harmed millions of European consumers by deliberately acting to keep competitors out of the market for computer chips for many years, European Union Competition Commissioner Neelie Kroes said in a statement.

The EU executive said Intel paid computer makers to postpone or cancel plans to launch products that used AMD chips, paid illegal, secret rebates so computer makers would use mostly or entirely Intel chips, and paid a major retailer to stock only computers with its chips.

It ordered Intel cease the illegal practices immediately to the extent that they are still ongoing.

Intel may continue to offer rebates, so long as they are legal, the Commission said.

The EU antitrust fine is the biggest imposed on an individual company, exceeding an 896-million euro penalty last year against glass maker Saint-Gobain for price fixing, and a 497-million euro fine in 2004 on Microsoft for abuse of dominance.

The Commission investigated practices dating back to 2002, and said Europe accounted for 30 percent of Intel's current worldwide 22 billion euro market.

The Commission said Intel must pay the fine, which represents 4.15 percent of the company's 2008 turnover, within three months of the date of the notification of the decision.

Intel, whose microprocessors power eight out of every 10 PCs in the world, posted first quarter sales of $7.1 billion. Analysts estimated the company enjoys a sizeable cash balance, generating close to $10 billion in cash last year.

The Commission, tasked with ensuring companies do not abuse any market dominance or make deals that restrict competition in the 27-country European Union, started its investigation into Intel in 2001 after a complaint by Advanced Micro Devices.

AMD has also filed a U.S. lawsuit against Intel, which is set to be heard in court in 2010.

The Commission characterized its investigation as one of several, citing rulings against Intel by the Japan Fair Trade Commission and the Korean Fair Trade Commission.

It also referred to investigations by the U.S. Trade Commission and the State of New York.

The decision comes against the background of a renewed determination by the United States to pursue dominant companies that use their power to crush rivals.

The U.S. Justice Department's antitrust chief, Christine Varney, announced this week she will be aggressively pursuing such abuse.

(Reporting by Foo Yun Chee, David Lawsky, Bate Felix; editing by Timothy Heritage)