This just in from Flexbeta: Graphics microchip maker Nvidia Corp said on Thursday it has ended arbitration with Microsoft Corp., maker of the Xbox video game system, after reaching an agreement on the pricing of graphics, audio and networking chips for the Xbox. Nvidia also said the two companies agreed to work together on "future cost reductions" for the Xbox. Further details were not disclosed, but Nvidia said it will provide more information during a conference call on Feb. 13.