As data centers strain the grid, these companies are betting big on AI's energy edge.Nvidia's (NVDA -2.79%) $100 billion agreement with OpenAI underscores a critical shift in artificial intelligence (AI): the limiting factor is no longer chips, but power. Each gigawatt of computing capacity draws on the scale of a nuclear reactor, making electricity the new bottleneck in AI growth. That dynamic puts fresh attention on companies working to build, supply, and optimize the infrastructure behind these energy-hu ...