In an initial determination, the US International Trade Commission judge ruled on Friday that graphics chipmaker Nvidia has violated three patents belonging to Rambus.
Nvidia was cleared of infringement by the ITC judge on two other Rambus patents under examination, however. The litigation involves memory controllers — which handle communications between memory chips and other silicon — related to graphics processors.
Rambus first filed patent claims against Nvidia in July 2008. In November of that year, it asked the ITC for an injunction on the import and sale of anything using Nvidia's memory controllers.
For more on this story, see Judge: Nvidia infringed on three Rambus patent on CNET News.
