Advanced Micro Devices (AMD) said Chief Operating Officer Lisa Su would immediately replace Rory Read as chief executive officer as the chipmaker expands beyond its core personal computer market. Dr. Su, 44, succeeds Rory Read, 52, who has stepped down as president and chief executive officer, and member of the board of directors, as part of a transition plan.

"Leadership succession planning has been a joint effort between Rory and the board and we felt that Lisa's expertise and proven leadership in the global semiconductor industry make this an ideal time for her to lead the company," said Bruce Claflin, chairman of AMD's board of directors. "The board looks forward to continuing to work with Lisa and the rest of the senior management team to build on the company's momentum. I would also like to thank Rory for his many accomplishments and contributions positioning AMD for long-term success by helping to create a strong foundation and clear path to re-establish the company's growth and profitability."

Commenting on her appointment, Dr. Su said, "I am deeply honored to have this opportunity to lead AMD during this important time of transformation. Our world-class technology assets combined with the incredible talent and passion of the AMD team provide us with a unique opportunity to shape the future of computing. I look forward to expanding on the strong foundation we have built under Rory's leadership as we develop industry-leading technologies and products for a diverse set of markets to drive sustainable and profitable growth."

AMD has been expanding into new markets such as game consoles and low-power servers and it aims to obtain half of its revenue from those additional businesses by the end of 2015.

During the last three years, AMD has made progress in financial and operational performance. The company returned to non-GAAP profitability and materially diversified its business. Since 2012, AMD has reduced operating expenditures by approximately 30 percent and maintained cash at near an optimal level of $1 billion. AMD also improved its balance sheet by re-profiling its debt with no significant debt coming due until 2019.