The new charges "reinforce the Commission's preliminary view ... that Intel has infringed rules on abuse of dominant position with the aim of excluding its main rival AMD from the x86 central processing units market," the Commission said.
Describing it as a "supplementary statement of objections" (SSO), the Commission's latest charge sheet focuses on three new elements of alleged abusive conduct that have occurred since it sent its first statement of objections to Intel last July. The new charges will be incorporated into the existing lawsuit.
Intel has paid hefty rebates to a leading European PC retailer conditional on it selling only Intel-based PCs, the Commission said. The retailer isn't named but is understood to be Media Markt, one of Europe's biggest chains of PC shops.
In addition, Intel made payments to induce a leading OEM (original equipment manufacturer) to delay the planned launch of a product line incorporating an Advanced Micro Devices-based CPU. Again the OEM wasn't named.
The third charge is for paying big rebates to that same OEM conditional on it obtaining all of its laptop CPU requirements from Intel, the Commission said.
Besides the new charges, the Commission also added evidence supporting the original charges it made against the company a year ago.
After reviewing the new statement of objections, Intel issued a statement saying, "the issuance of a second SO suggests that the Commission supports AMD's position that Intel should be prevented from competing fairly and offering price discounts which have resulted in lower prices for consumers ... It's clear that the allegations stem from the same set of complaints that our competitor, AMD, has been making to regulators and courts around the world for more than 10 years."
Intel remains "confident that the worldwide microprocessor market is functioning normally and is highly competitive," the company said. "Intel's conduct has always been lawful, pro-competitive and beneficial to consumers." The company's response to the Commission's charges will show the allegations are "unfounded," Intel said.
It set forth some likely arguments it will make to the Commission: "consumers have benefited from prices that have gone down significantly, output has increased many times over and the performance of products, including ours, has improved exponentially."
Through a spokesman, AMD declined to comment beyond saying that the charges are new and it is "taking a look at what the Commission has filed." However, after AMD looked over Intel's written statement, the spokesman amended that to say that the company would comment soon on what Intel had to say.
In the original SO, the Commission, Europe's top antitrust authority, charged Intel with handing out "substantial rebates" to computer manufacturers if they buy most of their x86 computer processing chips from Intel.
The Commission also accused the company of paying computer makers for scrapping or delaying the launch of machines fitted with AMD chips and of selling its chips for server computers at below cost to large customers such as governments and universities.
Each of the abuses outlined a year ago and Thursday is "provisionally considered to constitute an abuse of a dominant position in its own right," the Commission said.
But taken together, they reinforce each other and are part of a "single overall anti-competitive strategy aimed at excluding AMD or limiting its access to the market," the Commission added.
Intel has eight weeks to reply in writing to the SSO. It will then be allowed to defend itself in front of the Commission, AMD and other interested parties in a closed-door hearing.
If, after this procedure, the Commission still believes Intel is guilty, it will issue a ruling ordering the company to change its business practices in Europe. It may also impose a fine of up to 10 percent of Intel's global annual sales, which last year stood at nearly US$40 billion.
(Nancy Weil in Boston and Agam Shah in San Francisco contributed to this report.)