DOJ widens its investigation into price fixing in the graphics chip market Nvidia became the second major chip maker subpoenaed by the U.S. Department of Justice (DOJ) over an antitrust investigation into the market for graphics chips and cards, the company said Friday. Advanced Micro Devices was subpoenaed a day earlier.Nvidia, one of the world’s largest graphics processor makers, said no specific allegations have been made against it, and that it plans to cooperate with the DOJ in the investigation.The DOJ has not said specifically what it is investigating, but it has taken a hard line on price fixing in the chip industry in recent years. As of mid-November, the DOJ had charged four companies and 17 people in a DRAM price fixing investigation, securing fines totaling more than $731 million. In October, the DOJ began an investigation into the SRAM market. AMD recently entered the graphics chip business with its acquisition of ATI Technologies, which was finalized in October. The company also said the DOJ has not made any allegations against AMD or ATI, and that it intends to cooperate with the investigation. Technology Industry