Excerpt - Nvidia has uncovered a problem with some older graphics chips that shipped in "significant quantities" of laptop PCs, the company said Wednesday. Nvidia hasn't determined the exact cause of the problem but said it relates to a packaging material used with some of its chips, as well as the thermal design of some laptops. Modern processors generate considerable amounts of heat. To tackle the problem, the company is releasing a software driver that will cause system fans to start operating sooner and reduce the "thermal stress" on the chips. The driver has been provided to laptop makers directly,...