The lawsuit alleges at least six of Nvidia's product lines infringe the Rambus patents. They include chip sets, graphics processors and applications processors. The patents cover a broad range of memory technologies ranging from synchronous DRAMs to multiple generations of double data rate SDRAMs and graphics DRAMs, Rambus claimed.

The suit asks for an injunction that would prevent Nvidia from shipping the products as well as monetary damages. It's not clear whether the action could foreshadow more suits against companies who develop memory controllers.

The Federal Trade Commission ruled in 2006 that Rambus used anti-competitive practices in obtaining some of its memory patents. But that ruling was overturned in two separate appeals cases earlier this year.

By: DocMemory
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