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Updated from 1:56 p.m. EDT

The legal brigades of

Advanced Micro Devices

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sprang into action Wednesday, serving more than 70 companies with subpoenas in the latest phase of a court battle between the two chipmakers.

The list of third parties receiving document requests is a who's who of the tech industry, ranging from PC makers to software firms and electronics retailers.

AMD sent subpoenas to 32 companies Wednesday, including PC makers Alienware (which was recently acquired by


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), retailer


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and software firms

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. The document requests represents AMD's second major batch of subpoenas, following its initial round of third-party subpoenas in October.

The third parties have until the end of the year to produce documents that some believe will add up to hundreds of millions of pages in aggregate.

AMD believes the documents will shed light on what it alleges are Intel's anticompetitive and monopolistic business practices. AMD sued Intel, the world's No.1 chipmaker, in June 2005 for violating the Sherman Antitrust Act, contending that Intel routinely coerced customers to exclude using AMD's chips.

"Intel's conduct has unfairly and artificially capped AMD's market share and constrained it from expanding to reach the minimum efficient levels of scale necessary to compete with Intel as a predominant supplier to major customers," reads AMD's complaint, filed in federal court in Delaware.

Despite the claims, AMD's microprocessors have managed to increase their market share in the past year, thanks to what many consider to superior performance and energy efficiency. The company's chips accounted for 21.1% of the x86 microprocessor market at the end of the first quarter, compared to 16.9% a year earlier, according to Mercury Research.

Intel spokesperson Chuck Mulloy said that Intel maintains its business practices are both fair and lawful. He said Intel's subpoenas are simply a routine part of the discovery process as the company gathers evidence to make its case. Intel's document requests were sent to many of the companies already served by AMD in October, including Dell,


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Sun Microsystems

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Intel also has a motion pending with the judge, arguing that the court doesn't have jurisdiction over a good portion of the case, since all of AMD's microprocessor manufacturing operations are located overseas.

"There's no nexus in the U.S., so U.S. law does not apply," said Mulloy.

In addition to the AMD suit, 76 related class-action suits have subsequently been filed against Intel.

The judge has scheduled a meeting in September to consider a date for the trial, which many expect will take place sometime in 2008.

"We see no sign of Intel's anticompetitive behavior coming to an end," said AMD EVP of Legal Affairs Tom McCoy in a statement. "It is, therefore, not at all surprising that we've identified additional third parties that we believe may possess critical evidence of Intel's monopoly abuse, and we will continue to do so."

Shares of Intel were off 18 cents, or 1%, to $18.22 in recent trading. AMD shares slipped 0.8%, or 21 cents, to $25.21.