There are many ways to buy into the artificial intelligence (AI) frenzy. Many investors look to AI hardware designer Nvidia, making the former video gaming accelerator maven one of the most valuable companies in the world.

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.

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.

Warren Buffett is the CEO of Berkshire Hathaway ( BRK.A 0.99%) ( BRK.B 0.95%), 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.

Nvidia (NASDAQ: NVDA) is reporting tremendous demand for its graphics processing units (GPUs). It supplies these chips for gaming, data centers, automotive, and artificial intelligence (AI) researchers.