In the wiring, we often have user calls to reflect the CPU frequency is very low (for example, the Core 6300 runs at 1.6G; the Sempron 3200+ runs at only 900Mhz), and the user suspects that the hardware is faulty or the CPU is shipped with another model installed. In fact, this is AMD's energy-saving technology: “CNQ” and Intel CPU's energy-saving technology “EIST” is at work. Symptom: We often have user calls in the wiring to reflect the CPU frequency is very low (for example, Core 6300 runs at 1.6G; Sempron 3200+ runs at only 900Mhz), users suspect that hardware failure or CPU is installed when another One model. In fact, this is AMD's energy-saving technology: “CNQ” and Intel CPU's energy-saving technology “EIST” is at work. The following is an explanation of the different energy-saving technologies of the two manufacturers. Solution: 1. Intel CPU energy-saving technology: “EIST”; Introduction EIST is called “Enhanced Intel SpeedStep Technology”, which is a power-saving technology developed by Intel Corporation for mobile platform and server platform processors. . Later, the new desktop processor also built this technology. The Pentium 4 6xx series, Pentium D and CORE full range of processors with Intel frequency above 2.8G support EIST technology. It automatically adjusts the voltage and frequency of the processor based on different system workloads to reduce power consumption and heat generation. This adjustment process is completely automatic and requires no manual intervention. 2. How to turn off the "EIST" function EIST is turned on and off with the BIOS settings in the motherboard. Take the Acer desktop M460 as an example: enter the BIOS-Advanced BIOS Features option to find Intel EST (the default state is Enable), and turn it off to disable it. Note: Why is the CPU frequency measured by the software not a nominal integer? The frequency of the motherboard is realized by the crystal oscillator circuit on the motherboard. Some motherboards have independent crystal oscillator chips, some are integrated in the circuit. The crystal oscillator generates 14.318KHZ frequency. The motherboard circuit can obtain 133-333MHZ by multiplying it. The front-side bus frequency, the error generated at this time has been quite a lot, Intel or AMD's CPU again doubled the front-side bus frequency by frequency multiplication technology, and finally got the actual operating frequency of the CPU we can see in the system. Because there is always an error in the front, it is normal for the actual running frequency to have a difference of several megabytes from the running frequency of the label. AMD CPU energy-saving technology: "CNQ" rd. 1. Introduction: AMD's cool and quiet technology (Cool And Quiet) referred to as CNQ, is a kind of application started in the Athlon64 series processor so that the CPU can automatically adjust according to the system load level Frequency and voltage technology. The way the technology works is to control the CPU to reduce the frequency and voltage when idle or running low-load programs, so that the CPU power consumption is reduced, the heat generation is reduced, and when the fan can adjust the speed according to the temperature, the fan speed is lowered due to the temperature decrease. It is also reduced, thus achieving the effect of reducing noise and reducing energy consumption. 2. Cool and static technology needs 5 aspects to support, respectively: a. AMD 64-bit processor supporting this technology b. Enter the motherboard BIOS when booting, turn on the CNQ option c. Operating system to Windows xp sp1 or more d. Install CPU driver. Note: Be distinguished from dual-core patches; Vista systems do not need to be installed. e. System settings, select “Minimum Power Management” in the power scheme of “Power Management” in the “Control Panel”. 3. How to turn off this function If the above five installation requirements cannot satisfy one, then the function will be automatically turned off.