Yonah (microprocessor)

Yonah was a mobile dual-core processor from Intel, released in January 2006 under the Intel Core brand, specifically as the Core Duo and Core Solo. It was Intel's first mobile processor based on a multi-core design, preceding the desktop Core 2 line. Yonah processors were fabricated using a 65 nm process technology and were designed to replace the Pentium M processor.

Key features of Yonah included a shared L2 cache between the two cores (in the Core Duo models), support for Intel's Dynamic Power Coordination and Enhanced SpeedStep Technology for power management, and a front-side bus (FSB) speed of 667 MHz. Core Solo models featured only one active core and a smaller power envelope.

Yonah's architecture represented a significant departure from previous mobile Intel processors, offering increased performance and improved energy efficiency. However, it lacked support for Intel's 64-bit extensions (Intel 64, formerly EM64T), a limitation that was addressed in its successor, Merom. Yonah was primarily used in laptops and small form-factor desktop computers. It was eventually succeeded by the Core 2 Duo family of processors, marking a further advancement in Intel's mobile processor technology.