Co-founder and CEO of Nvidia Jensen Huang spoke to journalists during a trip to Beijing in July.Picture Alliance | Picture Alliance | Getty ImagesTwo Nvidia customers made up 39% of Nvidia's revenue in its July quarter, the company revealed in a financial filing on Wednesday, raising concerns about the concentration of the chipmaker's clientele."Customer A" made up 23% of total revenue, and "Customer B" comprised 16% of total revenue, according to the company's second-quarter filing with the Sec...