Chip designers Nvidia and Broadcom are running manufacturing tests with Intel, two sources familiar with the matter told Reuters, demonstrating early confidence in the struggling company’s advanced production techniques. The two tests, which have not been reported previously, indicate the companies are moving closer to determining whether they will commit hundreds of millions of dollars’ worth of manufacturing contracts to Intel. The decision to do so could generate a revenue windfall and endorsement for Intel’s contract manufacturing business that has been beset by delays and has not yet announced a prominent chip designer customer. Advanced Micro Devices is also evaluating...