Nvidia's stock has surged 81.5% this year and 531% over three years, driven by high demand for its AI-enabling graphics processing units and data center offerings. The company holds an estimated 80% share of the growing market for data center AI chips. However, investors are concerned that large tech companies developing custom AI chips could negatively impact Nvidia's performance. To address this, Nvidia is forming a custom chip business unit, led by Dina McKinney, to design custom chips for cloud computing companies and others.