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Encyclopedia > Cool'n'Quiet

Cool'n'Quiet is a CPU speed throttling and power saving technology introduced by AMD with their Athlon 64 processor line. It works by reducing the processor's clock rate and voltage when the processor is unutilized. The aim of this technology is to reduce overall power consumption and lower heat generation, allowing for slower (thus quieter) cooling fan operation. Hence the name Cool'n'Quiet. The technology is similar to Intel's SpeedStep technology and AMD's own PowerNow! scheme, however these were developed with the aim of increasing laptop battery life. Die of an Intel 80486DX2 microprocessor (actual size: 12×6. ... Advanced Micro Devices, Inc. ... The clock rate is the fundamental rate in cycles per second (measured in hertz) at which a computer performs its most basic operations such as adding two numbers or transferring a value from one processor register to another. ... International safety symbol Caution, risk of electric shock (ISO 3864), colloquially known as high voltage symbol. ... In electrical engineering, power consumption refers to the electrical energy over time that must be supplied to an electrical device to maintain its operation. ... Household Electric Fan A fan has two purposes – to move air for creature comfort or for ventilation and to move air or gas from one location to another for industrial purposes. ... Intel Corporation (NASDAQ: INTC, SEHK: 4335), founded in 1968 as Integrated Electronics Corporation, is an American multinational corporation that is best known for designing and manufacturing microprocessors and specialized integrated circuits. ... SpeedStep™ is a series of technologies (including SpeedStep, SpeedStep II, and SpeedStep III) built into some Intel processors. ... PowerNow! is a feature of AMDs K6-2+, K6-III+, mobile Athlon, and Turion 64 processors used in laptops. ...


Due to their different usage; Cool'n'Quiet on desktop and server chips, while PowerNow! is used for mobile chips — the technologies are similar, but not exactly equivalent. This technology was also introduced on "e-stepping" Opterons, however it is called Optimized Power Management, which is essentially a re-tooled Cool'n'Quiet scheme designed to work with registered RAM. The AMD Opteron (codenamed SledgeHammer during development) was the first of AMDs eighth-generation x86 processors based on the K8 or Hammer core, and the first processor to implement the AMD64 (formerly x86-64) instruction set architecture. ...


Cool'n'Quiet is fully supported in Windows Vista and modern[when? ] Linux kernels (using the powernow-k8 driver)[1]. In earlier versions of Windows processor drivers / Cool'n'Quiet software needs to be installed.[2]


Processors supporting Cool'n'Quiet

The Athlon 64 is an eighth-generation, AMD64 architecture microprocessor produced by AMD, released on September 23, 2003[1]. It is the third processor to bear the name Athlon, and the immediate successor to the Athlon XP[2]. The second processor (after the Opteron) to implement AMD64 architecture and the... The Athlon 64 is an eighth-generation, AMD64 architecture microprocessor produced by AMD, released on September 23, 2003[1]. It is the third processor to bear the name Athlon, and the immediate successor to the Athlon XP[2]. The second processor (after the Opteron) to implement AMD64 architecture and the... Socket 939 was introduced by AMD in June 2004 to supersede the previous Socket 754 for Athlon 64 processors. ... This does not cite any references or sources. ... Socket A (also known as Socket 462) is the CPU socket used for AMD flagship processors ranging from the Athlon K7 to the Athlon XP 3200+, and AMD budget processors including the Duron and Sempron. ... Socket 754 is a CPU socket originally developed by AMD to succeed its powerful Athlon XP platform (Socket 462, also referred to as Socket A). ... The Socket AM2, renamed from Socket M2 (to prevent using the same name as Cyrix MII processors), is a CPU socket designed by AMD for desktop processors, including the performance, mainstream and value segments. ... The AMD Opteron (codenamed SledgeHammer during development) was the first of AMDs eighth-generation x86 processors based on the K8 or Hammer core, and the first processor to implement the AMD64 (formerly x86-64) instruction set architecture. ...

References

  1. ^ Linux kernel CPUfreq subsystem - hardware. The Linux Kernel Archives. Retrieved on 2007-08-18.
  2. ^ Cool'n'Quiet™ Technology Installation Guide for AMD Athlon 64 Processor Based Systems (PDF). Advanced Micro Devices, Inc. (2004-06). Retrieved on 2007-08-18.

Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ... is the 230th day of the year (231st in leap years) in the Gregorian calendar. ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ... is the 230th day of the year (231st in leap years) in the Gregorian calendar. ...

External links

  • AMD Cool'n'Quiet


List of CPU power saving technologies

CPU power saving technologies // Intel SpeedStep AMD CoolnQuiet Transmeta LongRun Transmeta LongRun2 VIA LongHaul Category: ...



Intel SpeedStep | AMD Cool'n'Quiet | AMD PowerNow! | Transmeta LongRun | Transmeta LongRun2 | VIA LongHaul SpeedStepâ„¢ is a series of technologies (including SpeedStep, SpeedStep II, and SpeedStep III) built into some Intel processors. ... PowerNow! is a feature of AMDs K6-2+, K6-III+, mobile Athlon, and Turion 64 processors used in laptops. ... LongRun is a power saving technology in the Transmeta Efficeon processor. ... LongRun2 is a power saving technology in the Transmeta Efficeon processor. ... Cargo 360 (IATA: GG, ICAO: GGC, and Callsign: Longhaul)[] is a cargo airline based in Seattle, Washington. ...


  (italics indicate technologies for non-x86 processors) x86 or 80x86 is the generic name of a microprocessor architecture first developed and manufactured by Intel. ...


 
 

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