Nvidia signs up to Rambus patent licences -

Rambus has announced that it's signed a patent licence agreement related to some memory controllers.

Under the agreement, Rambus has granted Nvidia a licence for certain memory controllers at a one percent royalty rate for SDR memory controllers and a two percent royalty rate for other memory controllers. These include DDR, DDR2, DDR3, LPDDR, LPDDR2, GDDR2, GDDR3, GDDR4, and portions of GDDR5 memory controllers.

However, according to the announcement the patent agreement, which came into effect yesterday, the parties have not signed any releases of liability, or dismissed any outstanding litigation between them. Nvidia has also not granted any licences to Rambus.

The war between the two goes back a while. In July this year Nvidia was left reeling after losing its court at the US International Trade Commission against Rambus.

At the time it was reported that the loss would make it difficult for Nvidia chips to get into the US.

And last year an agreement reached with the European Commission, saw Rambus agreeing to license its patents related to memory controllers at a rate that wouldn't exceed 40 cents a unit.

Nvidia also owes Rambus for the eight years that it was allegedly infringing its patents and not paying up.

Rambus still has a civil lawsuit pending to seek that cash.