In December 2006 , Nvidia , along with its main rival in the graphics industry AMD ( which had acquired ATI ) , received subpoenas from the U.S. Department of Justice regarding possible antitrust violations in the graphics card industry .
In December 2006 NVIDIA , along with its main rival in the graphics industry AMD ( which bought ATI ) , received subpoenas from the Justice Department regarding possible antitrust violations in the graphics-card industry .