Nvidia Corp. (NVDA) said Thursday it has filed a countersuit against rival Intel Corp. (INTC), over a chipset contract dispute. Nvidia accuses the chip giant of violating a four-year-old cross licensing agreement that gave the two companies access to one another’s technologies. Nvidia said it seeks to terminate the agreement. The dispute erupted last month after Intel filed a motion before the same court claiming a 2004 chipset agreement did not give Nvidia the right to make chipsets that are compatible with new Intel semiconductors with “integrated” memory controllers. “Nvidia did not initiate this legal dispute,” said Jen-Hsun Huang, Nvidia president and chief executive, in a statement.