Nvidia has gotten so much attention during the artificial intelligence (AI) revolution, it's become easy to gloss over other compelling opportunities.

Warren Buffett is the CEO of Berkshire Hathaway ( BRK.A 0.30%) ( BRK.B 0.18%), which has delivered an annual return of 19.8% since Buffett took the helm in 1965. That could have turned an investment of $1,000 into more than $42 million. The same investment in the S&P 500 index would have grown to just $308,115 over the same period.

US tech giant Nvidia is spreading its investments into smaller-cap AI companies, which will help promote the adoption of its products. This comes as demand for its graphics processing units (GPUs) is on an increase and projected to remain firm supported by continued adoption of the AI technology across sectors.

The rapidly growing adoption of artificial intelligence (AI) has given shares of many companies a big boost in the past couple of years, and that's not surprising as this technology is expected to impact the global economy in a big way.

Nvidia's latest 13F filing showed investments in SoundHound AI and Applied Digital. SoundHound AI is seeing tremendous demand for voice assistance technology. Applied Digital benefits from the booming demand for data centers,