The AI leader spends much less on research and development than its big tech peers.Nvidia (NVDA -1.66%) has dominated stock market headlines over the last year, and for good reason.The inventor of graphics processing units (GPUs) is leading the AI revolution as its chips have been in high demand ever since OpenAI unveiled ChatGPT in late 2022. Nvidia's revenue has grown triple digits in each of its last five quarters, and the stock has jumped over 600% since the start of 2023, despite its recent pullback.Wh ...