AMD has formally asked dozens of IT companies to turn over documents related to chip purchases from Intel.

AMD filed an anti-trust lawsuit against Intel in June, claiming the world's largest chip maker has abused its dominant position in the processor market to pressure companies including Dell and Gateway from buying AMD products.

AMD issued subpoenas to over 30 PC and server companies requiring them to preserve any and all documents related to their purchases of Intel processors over the last several years.

Now, AMD is asking those companies to hand over the documentation so it can begin sorting through what is expected to be a massive pile of information.

The companies have a 30-day window to respond to the latest round of subpoenas, which were filed this week in Delaware.

AMD is claiming that Intel tied the distribution of rebates on processor purchases to assurances that PC and server companies would restrict their dealings with AMD. Intel has denied AMD's charges, saying that AMD's failure to gain market share is its own fault, not Intel's. AMD hopes to begin a jury trial before the end of next year.