Semiconductor giant Nvidia (NVDA) has been hitting new market-cap milestones at an unprecedented pace. Last year, it joined the $1 trillion market cap club, while its valuation surpassed $2 trillion in February this year.

The past two years have been absolutely phenomenal for Nvidia (NASDAQ: NVDA) investors, as shares of the graphics card specialist shot up 736% during this period once it became evident that the company is going to play a central role in the proliferation of artificial intelligence (AI).

The chipmaker has already been a huge winner, but investors may be overlooking a crucial detail that's hiding in plain sight.