Shares in chipmaker Intel skyrocketed on Thursday after AI giant Nvidia announced it would invest $5 billion in its struggling rival. The investment represents a significant commitment to Intel's turnaround efforts. Nvidia joins Japanese investment giant SoftBank and the US government in backing the once-dominant chipmaker, which has fallen behind in recent years after missing key technology shifts. "This marks a fusion of two world-class platforms," said Nvidia CEO Jensen Huang. "Together, we will expand our ecosystems and lay the foundation for the next era of computing." The Trump administration surprised the tech industry last month by taking a 10…