Struggling chipmaker Intel has hired former board member and semiconductor industry veteran Lip-Bu Tan as the latest in a succession of CEOs to attempt to turn around a once-dominant company that helped define Silicon Valley.

Shares of Intel Corp. jumped the most in five years after the company named Lip-Bu Tan as its next chief executive officer, entrusting a former board member and semiconductor veteran with one of the toughest jobs in the chip industry.

Lip-Bu Tan may be one of the most powerful technology executives you've never heard of. As he steps into one of the highest-profile jobs on the planet, CEO of troubled, storied chipmaker Intel, his performance will be on full display.