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Intel Core Duo Mobile Processors
By  Super Admin  | Published  11/26/2006 | Processors | Unrated
Intel Core Duo Mobile Processors

Intel Core is the name used for the processor codenamed Yonah (Hebrew transliteration for Jonah - יונה), released on January 5, 2006. It replaced the Pentium M brand used for earlier mobile processors with the same microarchitecture. It was part of a major rebranding effort by Intel starting January 2006; the next generation of desktop and mobile processors after the Intel Core processor is the Intel Core 2, replacing the Pentium brand.

Yonah was the code name for Intel's first generation of 65 nm process mobile microprocessors, based on the Banias/Dothan Pentium M microarchitecture, incorporating LaGrande security technology. SIMD performance has been improved through the addition of SSE3 instructions and improvements to SSE and SSE2 implementations, while integer performance decreased slightly due to higher latency cache. Additionally, Yonah includes support for the NX bit.

Core Duo is the world's first low-power (less than 25 watts) Dual Core microprocessor, with the previous low being AMD's Opteron 260 and 860 HE at 55 watts. Core Duo was released on 5 January 2006, with the other components of the Napa platform. It is the first Intel processor to be used in Apple Macintosh products (although the Apple Developer Transition Kit machines, non-production units distributed to some developers, used Pentium 4 processors).[citation needed]

Contrary to early reports, the Intel Core Duo supports Intel's Vanderpool virtualization technology, except in the T2300E model and proprietary T2050/T2150/T2250 mounted by OEMs, as indicated by the Intel Centrino Duo Mobile Technology Performance Brief and Intel's Processor Number Feature Table. However, it seems some vendors have chosen to disable this feature by default, making it available through a BIOS option.

EM64T (Intel x86-64 extensions) is not supported by Yonah. However, EM64T support is integrated in Yonah's successor, Core 2, code-named Merom.

Intel Core Duo consists of two cores on one die, a 2 MiB L2 cache shared by both cores, and an arbiter bus that controls both L2 cache and FSB access. Upcoming steppings of Core Duo processors will also include the ability to disable one core to conserve power.

Intel Core Solo uses the same two-core die as the Core Duo, but features only one active core. (There is still high demand for single-core mobile processors, and it is easier for Intel to disable one of the cores of the existing dual-core design than to launch a new production line of CPUs that physically only have one core. Additionally, this allows Intel to sell CPUs that didn't pass quality control because one of the cores was defective, by disabling it). Intel previously used the same strategy with the 486 CPU in which early 486SX CPUs were in fact manufactured as 486DX CPUs but the FPU failed quality control and the connection was physically severed.

Produced: 2006
Manufacturer: Intel
CPU Speeds: 1.06 GHz to 2.33 GHz
FSB Speeds: 533 MT/s to 667 MT/s
Process: (MOSFET channel length) 0.065 µm
Architecture: x86
Socket: Socket M
Core Name: Yonah

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