The company's fate is becoming more tied to one large customer.Nvidia (NVDA +1.40%) continued its streak of remarkable revenue growth in its third quarter (ended Oct. 26), as demand for its graphics processing units (GPUs) remains insatiable. However, there was one red flag in its report that investors should be aware of moving forward. Nonetheless, the stock jumped on the results, and it is now up more than 40% on the year.Let's dig into Nvidia's results and prospects to see whether investors should buy th ...