How to Undervolt a cpu

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One way to get a quieter PC is by reducing the speed of the fans, but this must be done without endangering the proper cooling of components. To facilitate this, one of the best ways is to get the components consume less and therefore generate less heat. One way to get a quieter PC is by reducing the speed of the fans, but this must be done without endangering the proper cooling of components. To facilitate this, one of the best ways is to get the components consume less and therefore generate less heat. There are two terms which comes under Undervolting. The first is the operating frequency and second is voltage. In the first it is performed with the cmos or bios and in second you play with the power source of processor.

Undervolting means that you minimize the CPU voltage by means of software. Mostly this is used as a cooling system that it is usually more effective than other cooling solutions (thermal grease, notebook cooler, etc.) prepared and with no additional costs. The temperature gains can be cool in extreme cases up to 20 ° C, but there are usually around 10 ° C.

Undervolting does not affect the performance of the processor. Only Underclocking and Overclocking (under or over clocking the processor frequency) change the CPU. Various benchmarks prove it. Nevertheless, there is a common misconception. The terms are not to be confused and undervolting does NOT affect the performance of the processor.

Remember that all CPUs are not identically manufactured for this process. Each CPU has different voltage tolerances. This is due partly to the production process and partly to the quality of the used materials (silicon purity, etc.) It is understood that Intel does not optimize the power of each CPU, and instead to determine for each individual chip is the lowest, yet stable power, Intel has a completely stable standard voltage for determined all the chips. This course is relatively high, so even the smallest of chip manufacturing quality must necessarily run stable. Undervolting makes the use and to reduce the voltage to optimize it for each chip.

If you reduce the voltage of the CPU, less current flows, which naturally results in less consumption and less heat with them. Should have the same CPU and GPU heat pipe in case of notebook mostly, you can reduce the temperature of the GPU undervolting.

What are the benefits of Undervolting :

Low Temperature : By using less, the Microcontroller dissipates less heat, and therefore we will see some lower operating temperatures. We raise frequency i.e. overclocking and with the same temperatures as the original voltage rating for performance, or you can lower the fan speed to have the same temperature as before with less noise.

Less expenses : By reducing consumption, we also reduce spending on our electricity bill. The reduction is not significant, but it is something that, ultimately, never hurts. You can take much account of the reduced, as discussed in this article on other voltages and frequencies change software for which you can use our calculator to estimate utility costs of a PC.

Increased component life: One of the problems that can have playing with the frequencies and voltages of a micro, as in the case of overclocking is that you can get to make the passage of current through the transistors is greater and therefore deteriorate before.). However, in this case do just the opposite i.e. to reduce consumption, extend the life of this component to work with lower consumption and lower temperatures.

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How to Undervolt a CPU

There are number CPUs that are supports this according to developers, but there is no guarantee that all functions are available for ever processor. This must be done manually, not always, as you can see AMD's Cool'n'Quiet and Intel EIST. This the physically induced heat from the chips, and reduced consumption. Reducing the voltage on the CPU can cause too much instability. This then leads to errors, crashes with blue screen or the computer just turns off. So perform an stability test of your processor before doing this. As a rule, you should take time once the CPU voltage to decrease until the CPU is slightly unstable.

First, it is important to know that the CPU voltage, you set in the BIOS either automatically or by the user, does not correspond entirely to the Vcore, which the processor is actually running. If you now use a tool like CPU-Z to read the actual CPU voltage and take the time to measure the voltage set with CoreTemp, you will notice that the two values differ.

Some cpu technical terms :

CPU (Central Processing Unit) processor, the main works from programs.
FSB (Front Side Bus) interface between the Northbridge and CPU. With the clock of the FSB multipliers and dividers, the frequencies of all the mentioned components are derived. Unlike desktop systems, it is possible for some laptop chipsets, using power-saving mechanisms to lower the FSB.
Multiplier (FID at RMClock) Stand together with the FSB, the final processor speed, are usually approached him about the various P-states.

Northbridge: Manages the data exchange between all mentioned components (CPU, memory, graphics card, Southbridge).
Southbridge: Manages the data exchange between all mentioned components (Northbridge, hard drives, USB controller, PCI slots, etc.)
RAM (Random Access Memory) Specifies the memory.

(RAM) divider: Is the difference between (similar to the multiplier on the CPU) with the FSB to memory clock of the RAM.

EIST (Enhanced Intel SpeedStep Technology) Intel's power saving feature reduces the voltage and frequency of the CPU to save energy. In the notebook sector, also including FSB, or display brightness can be addressed.
Cool'n'Quiet AMD's power saving feature reduces the voltage and frequency of the CPU to save energy.

VID (Voltage Identification) for the CPU assigned default voltage, is not transferable - each CPU has its own VID. Can be read as using the tool "CoreTemp".

VCore: the CPU core voltage, has a serious impact on the heat and life time of the CPU.

P-state: A voltage and frequency operating condition. Are the voltage and clock speed in front of a particular state.
C-State: Different stages of low-power modes, of C0 (operation) C3 (all CPU internal frequencies are stopped) until now C6 (reduces the VCore down to 0V).

SuperLFM: (Super Low Frequency Mode) with the Santa Rosa chipset introduced mode in which the FSB of the system is halved, hence each connected component only operates at half rate - is the energy savings.
For a Laptop.

Steps :

• First download HWMonitor. Open and run this HWMonitor. The program stores the maximum values of the respective temperatures and is fairly accurate. In addition, the program is very small and must be installed not only cumbersome.
• Start ORTHOS. The program simulates a full CPU load for both cores. Click on the Start button and run for about 10-15 minutes. Stop ORTHOS and close, move to the MAX HWMonitor and read and write temperatures.
• Then download and install RMClock. Run the tool.
• Click on Advanced CPU Settings. Choose a CPU type selection under each type, if not detected automatically. In our case, select mobile, select Apply these settings at startup and press Apply .
• Double click on Profiles and then Performance on Demand button in the submenu. Select Use P-state transitions for AC Power and Battery. In index select all boxes, be sure to scroll down and select all there. Click on Apply
• Now back in the main profile page click on dropdown menu Current. Select all boxes. If SuperLFM and IDA are at your processor while not select them. Deselect auto-adjust intermediate states VIDs.
• Then on the main page go on different multipliers and voltages. Multipliers are part of Intel Speed Step Technology. The processor is stressed, the CPU automatically clocked up by the multiplier (multiplier) increases, this happens in a split second. The higher the multiplier, the more power and brings the CPU clock and therefore needs a higher voltage.

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Tools for Undervolting Processor

RMCLOCK (Right Mark Cpu Clock Utility) : With the CPU Clock Utility RightMark can adjust the voltage and clock speed of the processor so that it is throttled in less demanding applications only. Thus, the processor generates less heat and therefore needs less cooling. RMClock uses AMD processors in modern integrated Cool'n'Quiet technology. Similarly, processors from Intel, such as the Core Solo / Core Duo, or equivalent desktop processors are supported.

RMClock supports almost the entire line of mobile processors families AMD K7/K8, as well as most of the processors Intel, ranging from the Pentium II. Run the latest version of RMClock can on Windows 2000/XP/2003/Vista 32-bit or 64-bit versions, though the 64-bit "Whist" with restrictions. In our discussion forum as there are reports of successful launches of Windows 7, although officially the OS is not supported.

CrystalCPUID : CrystalCPUID can change the CPU multiplier of processors while Windows is operating. The free software puts it on hand at the so-called CPU multiplier. First and foremost, the program is aimed at notebook users who want to extend their battery life. But also for various experiments, overclocking is quite CrystalCPUID. The key: All the changes enough freeware in operation continue directly to the processor. Via the menu item "Real-Time Clock" you can check the current frequency.

Notebook Hardware Monitor : This tool is design to provide control and monitoring support for system hardware. This is best recommended for notebook. You can manage cpu clock and other setting like monitoring cpu load and voltage. Other than this you also get support to monitor cpu and hard drive temperature. It is an full functional utility. The tool is equipped with an cpu multiplier. Whenever there is certain issue with the processor’s heat and temperature, it pops out an warning.