Setting the rotation speed of the processor cooler. How to control the cooler on a laptop

I think everyone would like to somehow reduce the noise made by coolers in the case or in the power supply.
There can be two reasons that lead to noise:

1) An old cooler is poorly lubricated, then it needs to be lubricated.

Spoiler

How to disassemble, lubricate and then reassemble a fan (Fan) if it starts to make more noise than usual.
The article is mainly devoted to preventive maintenance of fans assembled on plain bearings.

If one of the fans located in your system unit begins to make noise or rattle more than usual, then the reason, as a rule, is either bearing wear or lack of lubrication.

Fans used for cooling system unit(Case), processor (CPU), video card (Video card), hard drive (HDD) and memory (RAM), differ in size, design and type of bearings used.

Fans use only two types of bearings: plain bearings, including hydraulic bearings, and rolling bearings - ball bearings. There are, however, other options when, for example, the fan shaft is additionally supported magnetic field etc., but this circumstance does not in any way affect the preventive maintenance and repair of fans.

All fans used in PCs do not have a collector, but use an electronic winding switch. Therefore, the main parts subject to mechanical wear are bearings.

Fans with ball bearings.

In these fans, both the ball bearings themselves (two pieces) and the seats in which they are installed can be subject to wear, but the latter happens less often.

First of all, the ball bearing that is located on the impeller side wears out, as it experiences heavy loads.

Most fans use radial ball bearings, and the design of budget fans does not provide for the possibility of adjusting radial and axial play. This leads to premature wear of the ball bearings and increased noise of the entire fan.

Repairing a fan with ball bearings is advisable only in cases where it is not possible to find a suitable replacement. Such a fan, for example, could be a fan of an unusual design for a laptop or video card. In these cases, you can select a new fan of similar size and rearrange the ball bearings from it to replace the worn ones, if, of course, they fit there.

Fans on plain bearings.

The drawing shows a sectional view of a fan on a plain bearing.

1 – impeller,

2 – body,

3 – permanent magnet,

4 – PCB with controls,

5 – stator with windings,

6 – retaining ring,

8, 10 – oil recovery rings,

9 – bearing sleeve.

Here the motor shaft and bearing bushing are subject to wear. Moreover, in most fans, only one bushing is used, which covers the entire free length of the shaft. However, unlike miniature ball bearings, in plain bearings the load is distributed over a large area of ​​the bearing surface, which, in the presence of lubrication, makes these devices quite reliable in operation.

The reasons why fans assembled on sliding bearings that have not reached the end of their service life begin to make noise are the following: drying out of the lubricant, leakage of lubricant, use of low-quality lubricant and lack of lubricant (this also happens).

It is advisable to lubricate a regular budget fan that operates 12 or more hours a day at least once a year during the first inspection and after six months during each subsequent inspection. The more often such prevention is done, the less wear there is on the bearings and the corresponding fan noise.

Fans powered by undervoltage power, you can lubricate a little less often. Small high-speed fans should be lubricated twice as much as large case and processor fans.

Tools that may be needed when assembling, disassembling and cleaning the fan.
http://oldoctober.com/pics/fan/fan-2.jpg
To disassemble the fan, first remove the original label. Then remove the rubber plug. (In small fans, this function can be performed by a label).

Old organic grease can be removed with gasoline, and silicone grease with acetone, but care must be taken, since such solvents can ruin the appearance of the plastic parts of some fans. In this regard, the most harmless solvent is alcohol, but it does not dissolve fats well.

Apply a few drops of lubricant to the area of ​​the bearing and shaft, after putting on the first low-fail rubber ring. It is convenient to dose the amount of oil with a small screwdriver of the appropriate size. The wider the blade of the screwdriver, the larger the drop of oil.

Professor Preobrazhensky: “...and secondly, God knows what they threw in there. Can you tell me what comes to their mind?”

Dr. Bormenthal: “Anything!”

Under no circumstances use edible vegetable oil, thick lubricants or petroleum jelly to lubricate fans!

You can use machine, spindle, silicone, synthetic, mineral, household and other oils sold in retail stores. If we know more about the oil than just its name, then we will use an oil intended for lubrication of high-speed plain bearings.

Lubricants differ in a bunch of different parameters, but we cannot test most of them.

However there is one important parameter, which is easy to determine by eye, is viscosity. Even by dangling bubbles with oils of different viscosities, you can determine which one is more viscous. Indirect confirmation can also be the size of the drop that is held on the working surface of the screwdriver.

Oil with low viscosity can leak from a bearing that does not have seals (most budget fans do not have them), and oil with very high viscosity can make it difficult for the motor rotor to rotate.

However, any lubrication is better than no lubrication.

So, we have found out that by reducing the number of revolutions of the cooler, we will reduce the noise it produces.
Of course, productivity will drop slightly, but let’s say that in some “nodes” of the computer this will not cause a significant deterioration in cooling. Thus, fans that are installed in cases and power supplies are high-speed, and the noise/performance ratio is not always at the optimal level.
There are several ways in which noise can be reduced while cooling remains at an acceptable level.
So to speak, find " Golden mean" in noise/performance ratio.

Let's start with the simplest and cheapest methods:

Spoiler: Method No. 1.

Enable a function in the BIOS that automatically regulates fan speed.
According to the principle, the greater the load on the computer, the faster the fans rotate.
This function is supported by some motherboards: ASUS (Q-Fan control), Abit (Smart fan control), etc.
Let's look at the Q-Fan Control function, with the Silent/Optimal/Perfomans presets.

1) Go to the BIOS (Immediately before starting the boot, press the button repeatedly)
2) From the Main section go to the Power section

Similar adjustment systems are also present on other motherboards from other manufacturers.
If your board does not support this function, then I recommend paying attention to other methods.

Spoiler: Method No. 2.

Reducing cooler speed by switching.

In order to reduce fan speed, you can switch the fan to a lower voltage.
The nominal voltage for the fan is 12 Volts. And the entire specification (speed, noise level, current consumption, etc.) is indicated for the rated voltage.

Spoiler: Method No. 3.

Adjusting fan speed using rheobass.

To be able to constantly adjust the fan, you can use a device called REOBAS.
Reobas is a device that allows you to smoothly regulate the voltage supplied to the fan. As a result, the fan speed is smoothly regulated.
You can make a reobas yourself using the diagram below:

The first circuit is similar to the FanMate regulator from Zalman, which is used on processor coolers:

The adjustment range is from +5 Volts to +12 Volts. But the microcircuit gets a little warm.

The second circuit is a little more complicated, but it has a wider range of adjustments: from +1.5 V to +11.8 V. It is also possible to set the threshold lower voltage, since the starting voltage for the fan is +3.5 V.

Advantages this method- cheap and accessible, you just need to try a little.
==========================================
You can buy ready-made REOBAS from well-known companies in a 5.25" compartment.

Such reobass are produced by ZALMAN, SKYTHE, AeroCOOL, Akasa, etc.
Advantages: very beautiful and effortless. Disadvantage - expensive!

Which of the presented methods to choose is up to you.
©

Added after 2 minutes 51 seconds:

Spoiler:

Proper computer cooling

It's no secret that when a computer is running, all its electronic components heat up. Some elements heat up quite noticeably. Processor, video card, northern and south bridges motherboard– the hottest elements of the system unit. Even with normal computer idle time, their temperature can reach 50-60 degrees Celsius. But if the system unit is not periodically cleaned of dust, then the heating of the main components of the computer becomes even greater. Increased heating leads to constant computer freezes, fans work at increased speed, resulting in annoying noise. Overheating is generally dangerous and leads to an emergency shutdown of the computer.

Therefore, the main problem of the entire electronic part computer technology– this is proper cooling and effective heat removal. The vast majority of computers, both industrial and home, use air cooling to remove heat. It gained its popularity due to its simplicity and low cost. The principle of this type of cooling is as follows. All the heat from the heated elements is transferred to the surrounding air, and the hot air, in turn, is removed from the system unit case using fans. To increase heat transfer and cooling efficiency, the hottest components are equipped with copper or aluminum radiators with fans installed on them.

But the fact that heat removal occurs due to air movement does not mean at all that the more fans are installed, the better the cooling will be overall. Several incorrectly installed fans can do much more harm than solve the problem of overheating, when one correctly installed fan will solve this problem very effectively.

IN choice additional fans.

Before purchasing and installing additional fans, carefully examine your computer. Open the case cover, count and find out the dimensions of the mounting locations for additional case coolers. Look carefully at the motherboard to see what connectors it has for connecting additional fans.

Fans should be selected in the largest size that suits you. For standard cases this size is 80x80mm. But quite often (especially in lately) fans of sizes 92x92 and 120x120 mm can be installed in cases. With the same electrical characteristics a larger fan will be much quieter.

Try to buy fans from a large number blades - they are also quieter. Pay attention to the stickers - they indicate the noise level. If the motherboard has 4-pin connectors for powering coolers, then buy four-wire fans. They are very quiet, and their automatic speed control range is quite wide.

Between fans receiving power from the power supply via a Molex connector and operating from the motherboard, definitely choose the second option.

There are fans on sale with real ball bearings - this is the best option in terms of durability.

Installation of additional fans.

Let's look at the main points correct installation case fans for most system units. Here we will provide tips specifically for standard cases, since non-standard cases have such a varied fan arrangement that it makes no sense to describe them - everything is individual. Moreover, in non-standard cases, fan sizes can reach 30cm in diameter. But still, some aspects of cooling non-standard PC cases are discussed in the following article on proper cooling of computers.

There are no additional fans in the case.

This is the standard layout for almost all computers sold in stores. All the hot air rises to top part computer and, due to the fan in the power supply, goes outside.

The big disadvantage of this type of cooling is that all the heated air passes through the power supply, heating it even more. And therefore, it is the power supply of such computers that most often breaks down. Also, all the cold air is not sucked in in a controlled manner, but from all the cracks of the housing, which only reduces the efficiency of heat transfer. Another disadvantage is the rarefied air obtained with this type of cooling, which leads to the accumulation of dust inside the case. But still, it's better than incorrect installation additional fans.

One fan on the back of the case.

This method is used more out of desperation, since the case has only one place to install an additional cooler - on the back wall under the power supply. In order to reduce the amount of hot air passing through the power supply, install one fan that works to “blow” out of the case.

The fan must be installed opposite hard drives. It would be more correct to write that the hard drives should be placed opposite the fan. This way, the cold incoming air will immediately blow over them. This installation is much more effective than the previous one. A directed air flow is created. The vacuum inside the computer decreases - dust does not linger. When additional coolers are powered from the motherboard, the overall noise is reduced as the fan speeds are reduced.

Installing two fans in the case.

The most efficient method of installing fans for additional cooling system unit. A fan is installed on the front wall of the case for “blowing”, and on the rear wall – for “blowing”:

A powerful, constant air flow is created. The power supply operates without overheating, since heated air is removed by a fan installed under it. If a power supply with adjustable speed rotation of the fan, the overall noise will noticeably decrease, and more importantly, the pressure inside the case will equalize. Dust will not settle.

Incorrect installation of fans.

Below are examples of unacceptable installation of additional coolers in a PC case.

One rear fan is set to "injection".

A closed air ring is created between the power supply and the additional fan. Some of the hot air from the power supply is immediately sucked back inside. At the same time, there is no air movement in the lower part of the system unit, and therefore cooling is ineffective.

Three-wire:
1 - “-” power supply
2 - “+” power supply
3 - speed sensor

Four-wire
1 - “-” power supply
2 - “+” power supply
3 - speed sensor
4 - speed control
===========================
I should have added it a long time ago, but I forgot

The operation of a computer cooling system is tied to the eternal balance between noise and efficiency. A powerful fan operating at 100% will irritate with a constant noticeable hum. A weak cooler will not be able to provide a sufficient level of cooling, reducing the service life of the hardware. Automation does not always cope with the issue itself, so to regulate the noise level and cooling quality, the cooler rotation speed sometimes has to be adjusted manually.

When you may need to adjust the cooler speed

The rotation speed is adjusted in the BIOS, taking into account the settings and temperature on the sensors. In most cases this is enough, but sometimes the smart adjustment system fails. Imbalance occurs under the following conditions:

• overclocking the processor/video card, increasing the voltage and frequency of the main buses;
• replacing the standard system cooler with a more powerful one;
• non-standard connection of fans, after which they are not displayed in the BIOS;
• aging cooling system with noise at high speeds;
• contamination of the cooler and radiator with dust.

If the noise and increase in cooler speed are caused by overheating, you should not manually reduce the speed. It is best to start by cleaning the fans from dust; for the processor, remove them completely and replace the thermal paste on the substrate. After several years of use, this procedure will help reduce the temperature by 10–20°C.

A standard case fan is limited to around 2500–3000 revolutions per minute (RPM). In practice, the device rarely works on full power, producing about a thousand RPM. There is no overheating, but the cooler still continues to idle several thousand revolutions? You will have to correct the settings manually.

The heating limit for most PC elements is about 80°C. Ideally, you need to keep the temperature at 30–40°C: cooler hardware is only of interest to enthusiastic overclockers, with air cooled this is difficult to achieve. You can check information on temperature sensors and fan speeds in the AIDA64 or CPU-Z/GPU-Z information applications.

How to set the fan speed on your computer

You can configure it both programmatically (by editing the BIOS, installing the SpeedFan application) and physically (by connecting the fans via rheobass). All methods have their pros and cons and are implemented differently for various devices.

On a laptop

In most cases, laptop fan noise is caused by blocked or dirty vents. Reducing the speed of coolers can lead to overheating and rapid failure of the device.

If the noise is caused incorrect settings, then the issue is resolved in several steps.

Via BIOS

1. Go to BIOS menu by pressing the Del key in the first phase of booting the computer (on some devices - F9 or F12). The login method depends on the BIOS type - AWARD or AMI, as well as the motherboard manufacturer.
   

   Go to BIOS settings

2. In the Power section, select Hardware Monitor, Temperature or any similar item.
   

   Go to the Power tab

3. Select in settings desired speed cooler.
   

   Select the desired cooler rotation speed

4. Return to the main menu, select Save & Exit. The computer will restart automatically.
   

   Save the changes, after which the computer will automatically restart

The instructions deliberately indicated different BIOS version- most versions from different manufacturers iron will be at least slightly different from each other. If a line with the desired name is not found, look for one that is similar in functionality or meaning.

SpeedFan utility

1. Download and install the application from the official website. The main window displays information about the temperature on the sensors, data on processor load and manual adjustment of the fan speed. Uncheck the “Auto-adjust fans” checkbox and set the number of revolutions as a percentage of the maximum.
   

   In the “Indicators” tab, set required indicator speed

2. If the fixed number of revolutions is not satisfactory due to overheating, the required temperature can be set in the “Configuration” section. The program will strive for the selected number automatically.
   

   Set the desired temperature setting and save the settings

3. Monitor the temperature under load mode, when running heavy applications and games. If the temperature does not rise above 50°C, everything is fine. This can be done both in the SpeedFan program itself and in third party applications, like the already mentioned AIDA64.
   

   Using the program, you can monitor temperature indicators at maximum load

On CPU

All methods for adjusting coolers indicated for a laptop also work perfectly for desktop processors. Besides software methods adjustments, desktops also have a physical one - connecting fans via rheobass.

Reobas allows you to adjust speed without using software

Reobas or fan controller is a device that allows you to control the speed of coolers directly. Control elements are most often placed on a separate remote control or front panel. The main advantage of using this device is direct control over the connected fans without the participation of the BIOS or additional utilities. The disadvantage is that it is cumbersome and redundant for the average user.

On purchased controllers, the speed of the coolers is adjusted via an electronic panel or mechanical knobs. Control is implemented by increasing or decreasing the frequency of pulses supplied to the fan.

The adjustment process itself is called PWM or pulse width modulation. You can use the rheobass immediately after connecting the fans, before starting the operating system.

On the video card

Cooling management is built into most graphics card overclocking programs. The easiest way to deal with this is AMD Catalyst and Riva Tuner - the only slider in the Fan section precisely regulates the number of revolutions.

For video cards from ATI (AMD), go to the Catalyst performance menu, then enable OverDrive mode and manual control cooler, setting the indicator to the desired value.

For AMD video cards, the cooler rotation speed is adjusted through the menu

Nvidia devices are configured in the “Low-level” menu system settings" Here, manual fan control is checked, and then the speed is adjusted with a slider.

Set the temperature adjustment slider to the required parameter and save the settings

Setting up additional fans

Case fans are also connected to the motherboard or rheobass through standard connectors. Their speed can be adjusted in any of the available ways.

At in non-standard ways connections (for example, directly to the power supply), such fans will always work at 100% power and will not be displayed either in the BIOS or in installed software. In such cases, it is recommended to either reconnect the cooler via a simple rheobass, or replace or disconnect it completely.

Fan operation insufficient power can lead to overheating of computer components, causing damage to electronics, reducing the quality and life of work. Only correct cooler settings if you fully understand what you are doing. For several days after edits, monitor the temperature of the sensors and watch for possible problems.

A fan is one of the unnoticeable but extremely important devices that help create favorable conditions for work, relaxation and simply having a good time.

Without it, computers, refrigerators, air conditioners and other equipment will not be able to function. For maximum efficient work Various devices use a fan speed controller.

From our material you will learn about what types of regulators there are and the features of their operation. We will also tell you how to assemble the device yourself and what you will need for this.

Purpose of the device for speed control

When the air conditioner or fan is constantly running maximum power provided by the manufacturer, this adversely affects the service life. Some parts simply cannot withstand such a rhythm and quickly break.

A regulator is used to slow down the fan speed. Moreover, there are models that serve both one and several channels simultaneously. For example, 6 channel

Also often in refrigeration units, computers and other equipment certain elements overheat during operation. To prevent them from melting, the manufacturer has provided for their cooling by operating fans.

But not all tasks performed require maximum fan/cooler speed. At office work computer or maintaining a constant temperature in refrigeration unit the load is significantly less than when performing complex mathematical calculations or freezing, respectively. A fan that does not have a regulator will rotate at the same speed.

Manufacturers offer various models regulators that you can install yourself using the recommendations from the instructions

Cluster large quantity powerful equipment operating in one room can create noise at a level of 50 decibels or more due to simultaneously operating fans at maximum speed.

It is difficult for a person to work in such an atmosphere; he gets tired quickly. Therefore, it is advisable to use devices that can reduce the fan noise level not only in production workshops, but also in office premises.

In addition to overheating individual parts and reducing noise levels, regulators allow rational use of equipment, reducing and increasing, if necessary, the speed of rotation of the equipment blades. For example, in climate control systems used in many public places and industrial premises.

One of the important parts of smart rooms are speed controllers. Their operation is ensured by indicators of temperature, humidity, and pressure sensors. Fans used to mix the air in a gym, production workshop or office room help save money spent on heating.

Powerful ventilation systems use transformer speed controllers. Their main disadvantage is their high cost.

This occurs due to the uniform distribution of heated air circulating in the room. Fans force the upper warm layers down, mixing them with the cooler lower layers. After all, for human comfort it is important that there is warmth in the lower part of the room, and not under the ceiling. Regulators in such systems monitor the speed of rotation, slowing down and accelerating the speed of the blades.

Main types of regulators

Fan speed controllers are in demand. The market is replete with various offers and the average user who is not familiar with the features of devices can easily get lost among the various offers.

The regulator should be selected taking into account the power of the equipment to which it will be connected

Regulators differ in their operating principle.

The following types of devices are distinguished:

• thyristor;
• triac;
• frequency;
• transformer

First type devices is used to adjust the speed of single-phase devices that have overheating protection. The speed change occurs due to the influence of the regulator on the power of the supplied voltage.

Second type is a type of thyristor device. The regulator can simultaneously control constant and AC. Characterized by the ability to smoothly decrease/increase the speed of rotation at a fan voltage of up to 220 V.

To control the speed of 2 or more fans, you can use a 5-channel controller

Third type devices changes the frequency of the supplied voltage. The main task is to obtain a supply voltage in the range of 0-480 V. The controllers are used for three-phase equipment in room ventilation systems and in powerful air conditioners.

Transformer controllers can work with single and three-phase current. They change the output voltage, regulating the fan and protecting the device from overheating. Can be used in automatic mode for adjusting the speed of several powerful fans, taking into account the indicators of pressure, temperature, humidity and other sensors.

Transformer regulators are reliable. They are able to work in complex systems, adjusting the fan speed without constant user intervention

Most often, triac regulators are used in everyday life. They are classified as XGE type. You can find many offers from different manufacturers - they are compact and reliable. Moreover, the price range will also be very wide.

Transformer devices are quite expensive - depending on additional features, they can cost $700 or more. They belong to the RGE type regulators and are capable of regulating the speed of very powerful fans used in industry.

Features of using devices

Fan speed controllers are used in industrial equipment, offices, gyms, cafes, and other public places. You can also often find such controllers in climate control systems for home use.

To use the speed changer, simply connect it to the fan

Ventilation systems used in fitness centers, as well as in office premises, most often contain a rotation speed regulator. And it's not easy cheap option, but an expensive transformer device capable of regulating the rotation speed of powerful devices.

Image gallery

Depending on the design features, controllers are:

• mechanical control;
• automatic.

Autotransformer regulators are most often used in complex systems, where the command to action is provided by indicators obtained from a temperature, pressure, motion, humidity or photosensor. By slowing down the rotation speed, the devices reduce energy consumption.

Mechanically controlled regulators are connected according to the instructions and diagram. They can replace the usual switch by mounting the controller into the wall

Mechanical control of the controllers is carried out manually - the device contains a wheel that allows you to smoothly or stepwise change the rotation speed. This can often be found in triac models.

Among the regulators used to optimize the operation of industrial and household equipment, one can note such devices as Vents, SeBeP, Vortice, EnergySaver, Delta t°, Telenordik and others.

The most common option for using control equipment in a domestic environment is a computer and laptop. This is where the regulator is most often used, controlling and changing the speed of the cooler. Due to this device, the equipment creates significantly less noise during operation.

For computers you can choose the most suitable option based on personal preferences - there are a huge number of offers on the market

Cooler controllers come in both simple and additional features. These can be models with backlight, with a temperature sensor, with an alert signal, with an emergency shutdown, etc.

Based on their appearance, there are regulators with and without display. The first option is more expensive, and the second is cheaper. This device is often called a reobas.

Manufacturers offer models that control the operation of one or more fans. Good reviews They use cooler speed controllers from companies such as Scythe, NZXT, Reeven, AeroCool, Aqua Computer, Strike-X Advance Black, Akasa Fan Controller, Cooler Master, Innovatek, Gelid, Lian Li, etc.

A cooler regulator that does not have a display costs much less. But additional functions he doesn't have

Using a controller in computer operation significantly reduces the noise level, which has a positive effect on the user’s well-being and mood - nothing buzzes or roars. Also, which is very important, it helps to avoid overheating of the equipment itself, thereby extending its service life.

Controller connection rules

To connect the fan speed controller, you can use the services of specialists or try to do it yourself. There are no fundamental features in connection - it is quite possible to cope with such a task on your own.

All bona fide manufacturers must include instructions for the use and installation of their products

Depending on the design features and type of equipment being serviced, controllers can be installed:

• on the wall as an overhead socket;
• inside the wall;
• inside the equipment housing;
• in a special cabinet that controls smart devices at home. This is usually a terminal block;
• connect to the computer.

To connect the regulator yourself, you must first carefully read the instructions provided by the manufacturer. Such a document usually comes with the device and contains useful recommendations for both connection, use and maintenance.

Wall-mounted and in-wall models must be secured to the wall with screws and dowels. Components are most often supplied by the manufacturer along with the main device. Also in the instructions for the regulator you can see a diagram of its connection. This will make it much easier further work for its correct installation.

Schemes for connecting regulators from different manufacturers may differ. Therefore, you should carefully study the recommendations before installation.

The speed controller is connected to the cable supplying the fan, according to the manufacturer's diagram. The main goal is to cut the phase, neutral and ground wires and connect the wires to the input and output terminal blocks, following the recommendations. In the case where the fan has its own separate switch, it will have to be replaced with a regulator, dismantling the first one as it is unnecessary.

Do not forget that it must correspond to the maximum voltage current of the connected device.

It is important to find the inlet and outlet openings on the connected device for connecting the power cable of the appropriate cross-section. The diagram supplied by the manufacturer will help with this.

If you have to connect the controller to a PC or laptop, you first need to find out what the maximum permissible temperature individual components of technology. Otherwise, you can irretrievably lose your computer, whose important parts will overheat and burn out - the processor, motherboard, graphics card and others.

The model of the selected reobass also has instructions and connection recommendations from the manufacturer. It is important to adhere to the diagrams given on its pages when self-installation device.

If there is a need to connect more than 1 fan, then you can buy a multi-channel rheobass

There are regulators and devices built into the housing that are purchased separately. To connect them correctly, you should follow the instructions.

For example, an integrated controller has on/off buttons on the outside of the system unit. The wires coming from the regulator are connected to the cooler wires. Depending on the model, the rheobass can control the speed of 2, 4 or more fans in parallel.

For computer fans and others used at home, you can make a regulator yourself

A separate regulator for the cooler is installed in a 3.5 or 5.25-inch bay. Its wires are also connected to coolers, and additional sensors, if they are included, they are attached to the corresponding components of the system unit, the condition of which they have to monitor.

Assembling the device yourself

You can assemble the fan speed controller yourself. To do this, you will need the simplest components, a soldering iron and some free time.

To make your own controller, you can use various components, choosing the most suitable option for yourself.

So, to make a simple controller you need to take:

• resistor;
• variable resistor;
• transistor.

The base of the transistor must be soldered to the central contact of the variable resistor, and the collector to its extreme terminal. To the other edge of the variable resistor you need to solder a resistor with a resistance of 1 kOhm. The second terminal of the resistor should be soldered to the emitter of the transistor.

The manufacturing scheme of a regulator consisting of 3 elements is the simplest and safest

Now all that remains is to solder the input voltage wire to the collector of the transistor, which is already connected to the extreme terminal of the variable resistor, and the “positive” output to its emitter.

To test your homemade product in action, you will need any working fan. To evaluate a homemade reobass, you will need to connect the wire coming from the emitter to the fan wire with the “+” sign. The homemade output voltage wire coming from the collector is connected to the power supply.

Having finished assembling a homemade device for adjusting speed, be sure to check it in operation

The wire with the “–” sign is connected directly, bypassing the homemade regulator. Now all that remains is to check the operation of the soldered device.

To decrease/increase the speed of rotation of the cooler blades, you need to turn the variable resistor wheel and observe the change in the number of revolutions.

If you wish, you can create a controller with your own hands that controls 2 fans at once

This homemade device safe for use, because the wire with the “–” sign goes straight. Therefore, the fan is not afraid if something suddenly shorts in the soldered regulator.

Such a controller can be used to adjust cooler speed, and others.

Conclusions and useful video on the topic

Video about the features of connecting and using a fan speed controller from the Vents company:

Detailed video about the types of regulators, principles of their operation and connection features:

Video instructions with explanations of each step when performing work on assembling the cooler speed controller with your own hands. Moreover, to perform these actions you do not need to be a specialist - everything is quite simple:

Video information on creating a fan speed controller:

Review of electronic autotransformer fan speed controller:

After familiarizing yourself with the types of fan speed controllers and the rules for connecting them, you can choose the most suitable best option, able to satisfy the user's needs. If you wish, you can entrust installation issues to specialists. If you want to test your strength, then a simple device is easy to assemble yourself.

, fan settings…

Hello, dear readers, computer users. In this article we will look at BIOS options for fan speed control, selecting the type of fan speed control, and other options BIOS Setup For fan settings.

CHA Fan Duty Cycle
Select the rotation speed of additional fans as a percentage of the maximum value.
Option values:
60%, 70%, 80%, 90%, 100%

Chassis Fan Ratio
Using this option, you can set the rotation speed of additional fans when the temperature inside the system unit does not exceed acceptable values.
Option values:
Auto - automatic detection fan rotation speed;
60% -90% of the maximum value.

Chassis Q-Fan Control
This option allows you to set automatic adjustment rotation speed of additional fans of the system unit.
Option values:



CHA Fan Control
Chassis Fan Speed ​​Control
SYS Fan Speed ​​Monitor
System Fan Control
System Smart Fan Control

CPUFAN2 Tmax
Setting the processor temperature value at which the fan CPU cooler will work at maximum speed.
Option values:
55°C-70°C
This option may also appear under the following names:
Fan Auto Mode Full Speed ​​Temp
FAN1 Limit Temp °C
Full Speed ​​Temperature (°C)
Q-Fan1 Full Speed ​​Temperature

CPU Fan Duty Cucle
Select the CPU cooler fan speed as a percentage of the maximum value.
Option values:
60%, 70%, 80%, 90%, 100%
This option may also appear under the following names:
Manual Fan Speed, %

CPU Fan Control
Function of automatic fan speed control depending on the processor temperature (as the processor heat dissipation increases, the cooler fan speed increases and vice versa). The option is relevant for Biostar motherboards.
Option values:
Always On - disable automatic fan speed control;
Smart - set automatic fan speed control.

CPU Fan Ratio
Using this option, you can set the rotation speed of the processor cooler fan when the processor temperature does not exceed acceptable values.
Option values:
Auto - automatic detection of the rotation speed of the processor cooler fan at low processor temperatures;
20% -90% of the maximum value.
This option may also appear under the following names:
Minimum FAN Duty Cycle

CPU Fan Start Temperature
Setting the processor temperature value, upon reaching which the processor cooler fan will operate at minimum speed.
Option values:
20°C-50°C
This option may also appear under the following names:
CPUFAN2 Tmin
Fan Auto Mode Start Speed ​​Temp
FAN1 START Temp °C
Low CPU temp °C
Q-Fan1 Start Temperature
Start Up Temperature (°C)

CPU SmartFAN Idle Temp
Setting the minimum fan speed.

CPU Smart Fan Target
Function of automatic fan speed control depending on the processor temperature (as the processor heat dissipation increases, the cooler fan speed increases and vice versa). The option is relevant for MSI motherboards.
Option values:
Disabled - disable automatic fan speed control;
Temperature value (from 40 to 70 in steps of 5) at which automatic fan speed control will be turned on.

CPU Slope PWM
Setting the step to increase the rotation speed of the processor cooler fan as the processor temperature increases.
Option values:
0-64
This option may also appear under the following names:
CPU Fan Slope (PWM/°C)
FAN1 Slope Select PWM/°C
Slope PWM
Slope Select PWM/°C

CPU Target Temperature
Setting the processor temperature that the cooling system will have to maintain by increasing/decreasing the rotation speed of the processor cooler fan.
Option values:
10°C-85°C
This option may also appear under the following names:
CPU Smart Fan Target Temp Select
CPU Smart Fan Temperature
Smart CPU Fan Target
Smart CPU Temperature
Smart CPUFAN Temperature
CPU Smart Fan Control
Function of automatic fan speed control depending on the processor temperature (as the processor heat dissipation increases, the cooler fan speed increases and vice versa). The option is relevant for maternal Gigabyte boards and ECS.
Option values:
Disabled - disable automatic fan speed control;
Enabled - set automatic fan speed control.

CPU Q-Fan Control
Function of automatic fan speed control depending on the processor temperature (as the processor heat dissipation increases, the cooler fan speed increases and vice versa). The option is relevant for ASUS motherboards.
Option values:
Disabled - disable automatic fan speed control;
Enabled - set automatic fan speed control.

CPU Quiet Fan
Function of automatic fan speed control depending on the processor temperature (as the processor heat dissipation increases, the cooler fan speed increases and vice versa). The option is relevant for ASRock motherboards.
Option values:
Disabled - disable automatic fan speed control;
Enabled - set automatic fan speed control.

FAN2 Start PWM Value
Setting the initial rotation speed of additional fans in conventional units.
Option values:
0-127

FAN2 Slope Select PWM/°C
Setting the step to increase the rotation speed of additional fans as the temperature inside the system unit increases.
Option values:
0-64

FAN2 START Temp °C
Setting the temperature value inside the system unit, upon reaching which additional fans will operate at minimum speed.
Option values:
20°C to 50°C

Front Fan Target Temp Value
Setting the temperature inside the case, which the cooling system will have to maintain by increasing/decreasing the fan speed on the front panel of the system unit.
Option values
25°C-50°C

Lowest Fan Speed
CPU cooler fan speed control at low processor temperatures.
Option values:
Off - stop the fan when the processor temperature is low;
Slow - maintain minimum fan speed at low processor temperatures.

Lowest System Fan Speed
Controlling the speed of additional fans at low temperatures inside the system unit.
Option values:
Off - fans stop;
Slow - maintain minimum fan speed.

MCP Fan Speed ​​Control, %
Selecting the rotation speed of the chipset system controller cooler fan as a percentage of the maximum value.
Option values:
0 %-100 %

Mem Fan Speed ​​Control, %
Select the rotation speed of the memory module cooler fan as a percentage of the maximum value.
Option values:
0 %-100 %

Rear Fan Target Temp Value
Setting the temperature inside the case, which the cooling system will have to maintain by increasing/decreasing the fan speed on the rear panel of the system unit.
Option values
25°C-50°C

Smart NB Fan Target
Setting the temperature of the chipset system controller, which the cooling system will have to maintain by increasing/decreasing the rotation speed of the fan cooling the system controller.
Option values
25°C-50°C

SPP Fan Speed ​​Control, %
Selecting the rotation speed of the cooler fan of the chipset functional controller as a percentage of the maximum value.
Option values:
0 %-100 %

Start Up PWM
Setting the initial rotation speed of the processor cooler fan in arbitrary units.
Option values:
0-127
This option may also appear under the following names:
CPU Fan Start PWM Value
FAN1 Start PWM Value
Low CPU fan PWM duty
StartUp/Stop PWM

Target Fan Speed
Selecting the fan rotation mode when the temperature is below the permissible temperature.
Option values:
Fast - the fan will rotate quickly;
Middle - the fan will rotate at medium speed:
Slow - the fan will rotate slowly.

Q-Fan1 Stop Temperature
Setting the processor temperature value, upon reaching which the operation of the processor cooler fan will be stopped.
Option values:
20°C-40°C

Q-Fan Control
This option allows you to automatically adjust the fan speed depending on the processor and chipset temperatures.
Option values:
Disabled - disable automatic fan speed control;
Enabled - set automatic fan speed control.

Q-Fan Controller
Function of automatic control of the rotation speed of all fans connected to the connectors on the motherboard.
Option values:
Disabled - disable automatic fan speed control;
Enabled - set automatic fan speed control.
This option may also appear under the following names:
ASUS Q-FAN Control
Q-Fan Support
Smart Q-Fan Function

Article taken from open sources: http://userwords.ru/2011/09/bios_3914.html

Cooler – important element cooling system of the system unit, preventing overheating of the main components. However, sometimes the fan works too hard, producing unnecessary noise. Let's see how to change the fan speed using Speedfan programs and built-in BIOS tools to adjust the level of noise produced.

Using SpeedFan

The SpeedFan cooler speed control program is the most famous utility with which users control fan operation. It spreads across free license, also has Russian-language interface, which can be enabled in the “Options” section.

Important! In order for you to control the cooler, it must be connected to the motherboard via a 3-pin connector. If you have several fans and they are powered directly from the power supply, then you must switch them, otherwise you will not be able to increase or decrease the speed of the cooler.

The utility provides many functions for managing computer components, but we will focus specifically on working with the cooler:

1. Pay attention to the item “CPU 0Fan” - it reflects the rotation speed of the processor cooler.
2. Below you see several fields with percentages. You need to find the field that is responsible for the cooler. This is done like this: you alternately change the value of each of the fields to 50-70% and see when the number of revolutions in the “CPU 0Fan” item begins to drop.
3. Using the found field, reduce the rotation speed so that the cooler starts to operate more quietly. Don't forget ; If the fan doesn't cool the chip enough, it will overheat.

In a similar way, you can adjust the speed of all coolers connected to the motherboard. You can use a more flexible setting option and specify not a specific value, but a range of fan rotation intensity.

The rotation speed of the blades should decrease, and the noise from the cooler should decrease. Don't forget to monitor the processor temperature in the "CPU" line. If it exceeds 70 degrees, run the cooler at full power.

Using BIOS Tools

The fan rotation speed can be adjusted without using special utilities. All the tools necessary to perform this action are included in basic system input-output; To use them, you just need to know how to set the cooler speed in the BIOS.

This method may seem difficult to novice users who have never worked with BIOS. Therefore, if you are not confident in your knowledge, it is better to choose Speedfan.

Changing the cooler speed is done by activating certain functions in the BIOS and setting threshold temperature values, upon reaching which the fan starts or turns off (if possible).

The main disadvantage of this method is the need to activate several utilities, the name and number of which varies depending on the BIOS version, motherboard model and processor generation. For example, for Intel chip Core, you need to activate the AI ​​Quiet and Intel SpeedStep utilities, which automatically reduce the fan intensity when the processor temperature is low.

Another difficulty is that all parameters have to be configured manually, plus sometimes it is necessary to change them “on the fly” if the operating conditions of the computer become different. Each time you will have to adjust the settings again, turning the utilities on/off, so to solve the question of how to adjust the cooler speed, it is better to choose the SpeedFan utility.