How to connect a molecu fan to the mother

Blums for fans and the safety of components. How to connect a lot of fans and not burn a motherboard

You purchased a motherboard with a small number of connectors for connecting fans, but you want to increase their number for modding of the case or improve temperature indicators and overclocking results? Do not rush to buy bakers until you get acquainted with this article.

Undoubtedly, when the PC user has a very limited budget when choosing a motherboard, he has to compromise between the price of the board, quality and functionality. Enthusiasts pay attention to the processor subsystem and the ability to accelerate, ordinary users are more interesting to the design of the board, for some an important criterion is the compactness of the motherboard. But how many of us pay attention to the amount of 3-PIN and 4-PIN of the connectors when choosing a motherboard, is this criterion for someone decisive when buying? It seems that for the majority whose budget is limited 100. 120, this criterion is by no means in the first place.

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And so, we find the perfect motherboard, let’s say how it was in my case. ASUS TUF B450M-Pro Gaming. Great fee with a good “pet” for its price, which can easily cope with some Ryzen 9 3900x, with convenient and understandable BIOS and performance at a very high level. But in the hot summer the problem of high temperatures of components PC and the issue of blowing up the housing are becoming more actual than ever. And then a serious drawback of this motherboard is unexpectedly revealed, we can say typical for compact motherboards and “budget boards”. Small opportunities to ensure proper blowing of the body. After all, what are three 4-pin connectors on the board? This is power for the processor cooler fan and two more case fans, usually located on a blowing and blowing.

But the fee is overclocking, which allows you to well disperse even eight.Core processors. And for good acceleration while maintaining comfortable temperatures and an acceptable noise level with two case fan fans. It is advisable to have a “two.Headed” tower with two turntables, such as Gelid Phantom, inexpensive and excellent for cooling the Ryzen 3000 series, including Ryzen 9 3900X with a small underwear.

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And so, after buying a good tower, it turns out that only one connector remains to connect housing fans in our board. Naturally, there is no talk of any overclocking in the summer when there is a fairly hot processor, powerful video card and only one case fan.

Of course, you can use an open stand, placing it directly under the air conditioning or open window, but such a solution leads to an increase in risks associated with the safety of components.

A fairly banal solution among enthusiasts and amateurs will be the purchase of a cheap brancher that allows one connector to connect several fans at once. But how safe it is. Let’s find out.

The main characteristics of the fans

Static pressure. The pressure of the air created by the fan. Depends on its design and speed of the impeller. The higher this indicator, the better the fan works in conditions of high resistance (for example, when pumping air through a small.Fiber radiator).

Air flow (CFM). The number of pumped air. Historically established units of measurement. Cubic feet per minute. Effective work is shown by CFM devices more than 50.

Rotation speed (RPM). Number of revolutions per minute. The more, the higher the performance (and noise). Most models do not exceed 2000.

Lapisten-mopulse modulation (PWM, or PWM)-automatic adjustment of the fan revolutions using the motherboard. Requires a 4 pin connector. You can carry out accurate configuration using special branded utilities.

Fan Sleeving Guide For Noobs | Common Fan Cables 3pin 4pin Molex Daisy Chain

Fan thickness. Usually about 25 mm. For small buildings (HTPC), thinner versions are available, but their effectiveness is lower due to the weaker static pressure and CFM.

The type of bearing is an important characteristic on which the resource and the level of noise created depend. In modern models, you can find several types: from the cheapest sliding bearing (with a low resource) to the most expensive and rare ceramic rolling bearing and bearing with magnetic centering. Golden middle in resource, price and noise are turntables with a hydrodynamic bearing.

Noise level. Measured in DBA. The value comfortable for the human ear should not exceed 30 dBA. Fans. Does not mean noisier. Most often the situation is the opposite, especially if the fans controls the motherboard that controls the temperature of the components.

The fight against the noise: put the cooler at 7 volts

You just bought the brand new cooler Thermaltake, but you do not like that after installing it, your computer began to make noise like a vacuum cleaner? You want to put Blue Orb on a video card, but it is too loud for you? And you do not care about cooling. You don’t need acceleration, you need silence? Then we will help you. Anything you need. Reduce the voltage on the cooler. In this article, we will tell you how to do this in five minutes, without a soldering iron, with a tweezer, or screwdrivers.

connect, molecu, mother

So for starters. All coolers sold now for processors work from a voltage of 12 volts. At the same time, the fans reach the declared speed and work in accordance with the declared characteristics. Both performance and fan noise level are written for rated voltage. The fans uses micro.Motorized currents. The frequency of their rotation directly depends on the voltage supplied. Therefore, if we increase the voltage on the fan, it will begin to rotate faster. If reduced. Slower. Getting a voltage above 12 V is possible on the ATX connector of the power supply, but we do not need it, because we are fighting with noise, which means that we need. It is a little lower the voltage of the fan.

In the article “New generation of coolers” I mentioned the methods of connecting fans. Let’s get back two years ago and look at them again:

How fans are connected. Fans for computer coolers have two types of connection. Via PC plug Connector and via Molex Connector.

PC plug Connector is a standard four.Wire connector used in most computer devices. Its advantages are that its use allows you to connect a practically unlimited number of fans (with Pass-Through connection). Also, when using it, you can adjust the power consumed by the fan. PC Plug has four wires. Two grounding wires (black), a wire with a potential of 5 V and a wire with a potential of 12 V. If your fan irritates you with its noise, then you can reduce the voltage supplied to it to 7V, or 5V. For this, in the first case, it must be attached to two extreme wiring. Red and yellow, and in the second case. To red and one of the black wiring. At the same time, follow the polarity, otherwise your fan will spin the other way.

Molex Connector. Newer. It allows you to connect the fans to the motherboard, automatically control the fan power consumption and track the fan speed. The disadvantages of this connector. A limited number of connected fans, depending on the motherboard, is inability to manually reduce the power consumption. The advantages are that with sufficient cooling, the motherboard lowers the voltage to the fan, it consumes less power and, as a result, less noise. Also, with the help of the Molex connector, it is possible to monitor the speed of rotation of the fan, but provided that the hall sensor is installed in the fan.

Today, 95% of all coolers sold are connected via Molex Connector. And since there is only plus and earth on the motherboard in the Molex connectors (we do not count the signal), the easiest way to recently was the seal of additional resistance to the wire that feeds the fan, that is, in the central wire. It is not difficult to do it. It is enough to choose the right resistance for a fan with a capacity of two to eight watts and connect it in a section of the middle wire. We saw this in industrial performance on the Kuler Zalman CNPS 5000. True, here the resistances were included in a section of the middle wire on special adapters.

With this regulation, you can achieve completely different stresses. But this method has a number of disadvantages.

Resistance is very warm when fan operation

The fan modified in this way loses the guarantee (if it was)

Of course, real techies would choose this way when you can put a rheostat (resistor with variable resistance), but we know the method better, easier and faster.

connect, molecu, mother

So, as you could see above, a voltage of 7 volts is always maintained between the extreme wires of the PCPLUG of the connector. This is what we need. It is almost half as 12V, which means that the cooler will make noise much less, though and cooling weaker. All we need. This is so that the pcplug-molex adapter comes to the cooler. These adapters today are delivered with all the new queens of Thermaltake, with all the coolers on video cards and system chips, if the cooler go to Retail, not OEM. And since all such coolers are supplied precisely by Retail, you have the right to demand an adapter from a company that sold you a computer with an installed, say, Dragon Orb 3.

Look at the adapter. Here he is, before us. It is a consistent Pass-Through Connection of two PCPLUG connectors so that when the cooler is connected, not to lose the PCPLUG socket. Molex Connector (also with pins) is connected to the PCPLUG MALENNNECTOR PCPLUG (with pins) in parallel. The red wire of the Molex connector is connected to the yellow on PCPLUG, and black. To black. Thus, from the 12th of the PCPLUG contact, the potential of 12V is transmitted to the average Molex wire. The second wire (black) on the Molex connector. This is the earth. The potential on this wire is 0 in. Respectively, the voltage between the two wires (potential difference) is 12V. It is the voltage that determines the speed of rotation of the fan. Therefore, in order to reduce the potential difference between two wires, we will supply a positive voltage to the “Earth” Molex. To do this, the Black Molex wire must be connected to the red wire on PCPLUG. As a result, there will be 12V on one wire, on the other. 5V, as a result, the potential difference will be 7V, and since the potential will remain large on the yellow wire, the direction of rotation of the fan will not change.

How do we do it? Pretty simple. The whole operation will take you no more than five minutes. All that you need to have for this operation. This is a thin screwdriver, or tweezers also, may be needed by pliers, but this is if desired.

The fight against the noise: put the cooler at 7 volts

You just bought the brand new cooler Thermaltake, but you do not like that after installing it, your computer began to make noise like a vacuum cleaner? You want to put Blue Orb on a video card, but it is too loud for you? And you do not care about cooling. You don’t need acceleration, you need silence? Then we will help you. Anything you need. Reduce the voltage on the cooler. In this article, we will tell you how to do this in five minutes, without a soldering iron, with a tweezer, or screwdrivers.

So for starters. All coolers sold now for processors work from a voltage of 12 volts. At the same time, the fans reach the declared speed and work in accordance with the declared characteristics. Both performance and fan noise level are written for rated voltage. The fans uses micro.Motorized currents. The frequency of their rotation directly depends on the voltage supplied. Therefore, if we increase the voltage on the fan, it will begin to rotate faster. If reduced. Slower. Getting a voltage above 12 V is possible on the ATX connector of the power supply, but we do not need it, because we are fighting with noise, which means that we need. It is a little lower the voltage of the fan.

In the article “New generation of coolers” I mentioned the methods of connecting fans. Let’s get back two years ago and look at them again:

How fans are connected. Fans for computer coolers have two types of connection. Via PC plug Connector and via Molex Connector.

PC plug Connector is a standard four.Wire connector used in most computer devices. Its advantages are that its use allows you to connect a practically unlimited number of fans (with Pass-Through connection). Also, when using it, you can adjust the power consumed by the fan. PC Plug has four wires. Two grounding wires (black), a wire with a potential of 5 V and a wire with a potential of 12 V. If your fan irritates you with its noise, then you can reduce the voltage supplied to it to 7V, or 5V. For this, in the first case, it must be attached to two extreme wiring. Red and yellow, and in the second case. To red and one of the black wiring. At the same time, follow the polarity, otherwise your fan will spin the other way.

Molex Connector. Newer. It allows you to connect the fans to the motherboard, automatically control the fan power consumption and track the fan speed. The disadvantages of this connector. A limited number of connected fans, depending on the motherboard, is inability to manually reduce the power consumption. The advantages are that with sufficient cooling, the motherboard lowers the voltage to the fan, it consumes less power and, as a result, less noise. Also, with the help of the Molex connector, it is possible to monitor the speed of rotation of the fan, but provided that the hall sensor is installed in the fan.

Today, 95% of all coolers sold are connected via Molex Connector. And since there is only plus and earth on the motherboard in the Molex connectors (we do not count the signal), the easiest way to recently was the seal of additional resistance to the wire that feeds the fan, that is, in the central wire. It is not difficult to do it. It is enough to choose the right resistance for a fan with a capacity of two to eight watts and connect it in a section of the middle wire. We saw this in industrial performance on the Kuler Zalman CNPS 5000. True, here the resistances were included in a section of the middle wire on special adapters.

With this regulation, you can achieve completely different stresses. But this method has a number of disadvantages.

Resistance is very warm when fan operation

The fan modified in this way loses the guarantee (if it was)

Of course, real techies would choose this way when you can put a rheostat (resistor with variable resistance), but we know the method better, easier and faster.

So, as you could see above, a voltage of 7 volts is always maintained between the extreme wires of the PCPLUG of the connector. This is what we need. It is almost half as 12V, which means that the cooler will make noise much less, though and cooling weaker. All we need. This is so that the pcplug-molex adapter comes to the cooler. These adapters today are delivered with all the new queens of Thermaltake, with all the coolers on video cards and system chips, if the cooler go to Retail, not OEM. And since all such coolers are supplied precisely by Retail, you have the right to demand an adapter from a company that sold you a computer with an installed, say, Dragon Orb 3.

Look at the adapter. Here he is, before us. It is a consistent Pass-Through Connection of two PCPLUG connectors so that when the cooler is connected, not to lose the PCPLUG socket. Molex Connector (also with pins) is connected to the PCPLUG MALENNNECTOR PCPLUG (with pins) in parallel. The red wire of the Molex connector is connected to the yellow on PCPLUG, and black. To black. Thus, from the 12th of the PCPLUG contact, the potential of 12V is transmitted to the average Molex wire. The second wire (black) on the Molex connector. This is the earth. The potential on this wire is 0 in. Respectively, the voltage between the two wires (potential difference) is 12V. It is the voltage that determines the speed of rotation of the fan. Therefore, in order to reduce the potential difference between two wires, we will supply a positive voltage to the “Earth” Molex. To do this, the Black Molex wire must be connected to the red wire on PCPLUG. As a result, there will be 12V on one wire, on the other. 5V, as a result, the potential difference will be 7V, and since the potential will remain large on the yellow wire, the direction of rotation of the fan will not change.

How do we do it? Pretty simple. The whole operation will take you no more than five minutes. All that you need to have for this operation. This is a thin screwdriver, or tweezers also, may be needed by pliers, but this is if desired.

Determining the method of connecting coolers

Also, we should not forget that coolers have different connectors for connection and can be connected either to the computer motherboard or directly to the power supply.

At the moment, three main connection options are used, this is:

The 3-PIN and 4-PIN connectors are designed to connect to the motherboard, and the Molex connector is connected to the power supply.

It depends on the method of connecting whether you can control the rotation speed of the fans programmatic (without the use of Reobas). There is normal management only on coolers from 4-pin connectors. In this case, you can set certain speed depending on the temperature of the processor. Some motherboards allow you to control when connecting via 3 PIN. Well, the connection using Molex generally excludes the control control, since the power supplies directly from the BP.

Therefore, it is advisable to study the instructions for the motherboard in order to determine the number of connectors for fans, the number of contacts (3 or 4-pin), as well as the ability to control via 3-pin connection. If all the connectors on the motherboard are already busy, then additional coolers can be connected using the branch.

Step installation of cooler and video card

After the work done, there are two actions left: install the processor cooling system and video card. First take the cooler. Since the underwear of water cooling is used in the test PC, it is necessary to start with the radiator fastener to one of the walls. As we have already found out, Cooler Masterbox 5 MSI Edition supports the installation of a 120-mm single-section radiator on the back. Naturally, installation should be made so that Cooler Master Masterlique 120 fans blow air outside the case.

Transfer of the fan from the rear panel to the front, applying thermal paste and installing it on the rear panel

Therefore, first of all, we remove the 120-mm fan from the back wall and move it to the front panel, but so that it works for blowing. For installation, we use four fasteners with threads or plastic clips from the kit. Then we connect the fan to one of the 4-pin connectors on the motherboard, for example, to the SYS_FAN4 Connector.

Now it is necessary to apply thermal grease to the surface of the processor. To do this, squeeze out of the tube that comes with the cooling system, a small amount of liquid substance. The main thing is not to overdo it. Disputes about how to properly apply thermal grease. Someone just leaves a drop of thermointease exactly in the middle of the CP. Personally, I use a plastic card or cardboard visit, with which I smear the paste with an even layer. The processor and base of the cooler are pre-wiped with a cleaning cloth or cotton sticks moistened with some kind of technical fluid (alcohol, solvent or gasoline “Nefras). By this, you will remove fat and dust from the surface of the chip and sole from.

After applying the thermo.Intake, it remains only to fix the radiator on the rear wall of the case, and the water block with the pump in the processor nest. Complete with Cooler Master Masterlique 120 is a biaser that allows you to connect two fans to one 4-pin connector on the motherboard. I used it. We remove all the wires from it through the special holes behind the dividing wall and immediately bring them to the corresponding connectors: the cable from the pump. To the port pump_fan1, the cable from the fans. To the port of the port of CPU_FAN1.

First remove two plugs from the rear wall of the case. Most often, the graphic adapter is installed in the first (closest to the socket) PCI Express X16 connector. MSI X370 Gaming Pro Carbon supports AMD Crossfire and NVIDIA SLI technologies, allowing you to combine several video cards in the same system at once. If desired, you can install the second 3D-accelerator in the second peg slice.

In very cheap housings, the plugs will have to be broken out, that is, it will not be possible to fix them back. And some cases allow the use of long video cards only on condition that a basket (or basket) will be dismantled in advance for drives.

The final stage of installation of the video card is to connect the cables from the power supply to it.

How to connect 3 PIN fan to 2 pin in power supply

In modern power supplies, 2-pin connectors have not been provided for a long time (you can find it, most often in old ones). Instead, they can be equipped even with a 4-pin connector.

But we may have a fan with a 3pin connector or also with a branch of wires to the Molex connector, which in our case is not suitable (but very often). What to do?

  • If you just have 3 Pin Connector, then the 3rd wire is isolated, 2 first connectors (red and black, most often) are pulled out of a plastic latch and are placed instead, where there were contacts from the previous cooler (which was in the PSU).
  • If there are wired branches to the molecu (2 wires from a three-pele connector go), then we act in the same way as in the previous case, we only cut off the molecu connectors (so that they do not interfere with the PSU).

Additionally I will add a video on how to disassemble the connectors (the video is not mine, but very useful.)

I would be grateful to everyone who shakes this post on social networks. See you soon!

Features of the design of the motherboard

All motherboard manufacturers. Gigabyte, MSI, ASUS and less well.Known brands always equip a part, at least one connector for connecting a turntable.

Most often this is 3 PIN connector for connecting the processor cooling. 2 PIN and 4 PIN are almost not used for this purpose, but the motherboard can also be present on some models. It is precisely in order to power additional corps fans.

In their absence, a logical question arises. Where you can connect coolers if they were required more and, if there is no connector on the motherboard.

The only exit in this case is the connection to the power supply, most often through the Molex connector. If there are not enough molecules, as well as in some other cases, you can use a special adapter.

The only exception is adapters and branches with the motherboard: this type is not available, due to the features of the architecture of PC. All necessary adapters, you can find and see in this popular online store.

PSU Power Adapters Explained (SATA/Molex/6-pin/8-pin)

Computer cooling errors

Often, newcomers during the assembly of PC make a number of errors when designing a cooling system. If it works incorrectly, it will be ineffective and meaningless in terms of spending money.

Therefore, the main rule of installation is to know where the cooler is blowing. The most common mistakes in computer cooling:

  • You installed only the rear fan, which works on the “blossom”. Warm air, which when exit from the power supply is returned to the housing, and the components at the bottom will overheat.
  • There is only one front cooler in the case, working for “blowing”. Reduced pressure leads to the formation of a large amount of dust. Heat discharge does not occur, the fans work at the maximum, the computer heats up and makes noise.
  • The cooler, located behind, works for air blowing, and the front. To blow out. Warm air rises only up, and below it is cold. Incorrect circulation leads to overheating, and the effect will be like in the previous paragraph: a lot of noise, and the rapid wear of the components.
  • Both coolers work for a blowing. Fans work for wear, quickly fail and pull the rest of the components. From this arrangement of fans, as we see, it is also to the point of zero.
  • Both coolers blow air. This situation is the most dangerous for a computer or laptop! The pressure in the case is reduced, the air circulates poorly, all boards overheat and fail. Over time, the car can be thrown into the garbage.

As a result of the article I want to say that there are no fans in the housing. The larger there are, the lower the temperature inside the system unit. But each subsequent increases the noise in the room.

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