[needs update] If done properly fan noise can be drastically reduced. Forums. FREE Shipping on orders over $25 shipped by Amazon. plus countless trade shows and industry articles. That's what is happening when I plug it in the motherboard. You probably know by now that the standard IDE power connector from the power supply contains 2 voltage lines and a third which is derived from their difference: 12V, 5V and 7V. Sometimes all you want is to be able to switch between high and low speed. CPU-Lüfter steuern und Lautstärke anpassen mit SpeedFan. As soon as you begin trying to quiet your PC, you realize how useful it is to be able to provide lower than 12 volts DC (VDC) to fans in the system. You cannot connect the 5V signal cable to the 12V header. There are usually many small holes on the back panel that the switch can be mounted in. Eines für die Masse (0 V) und das andere für die Versorgungsspannung (+ 12 V). Simple as can be. Zur Drehzahländerung kann man wahlweise die Versorgungsspannung Ask Question Asked 4 years, 4 months ago. Using switches or knobs, attached fans can have their speeds adjusted by one of the above methods. This control method reduces noise issues and power requirements during periods of low usage, but when the system is operating at capacity, the fan noise can become a problem again. Fans may be either 5 Volt DC or 12 Volt DC fans. Heat production varies with system load, where periods of compute-intensive activity generate much more heat than the idle time does.. They can be mounted in an expansion slot or a 5.25" or 3.5" drive bay or come built into a computer's case. The CPU fan is usually supplied with a 3V or 5V from the PSU (power supply unit) on laptops and 12V on desktops. A standard cooling fan is a DC motor with blades attached. They need to be of the appropriate power rating. It requires only 2 parts: a switch and a male IDE power connector. Processors produce varying levels of heat depending on system load, thus it makes sense to reduce the speed of the fans during idle to decrease the noise produced by fans running full speed, until the load does goes up, at which point fan speed must be adjusted promptly to avoid overheating. For higher currents, discrete linear regulators are relatively simple to construct using a power transistor or MOSFET and a small signal transistor or a Zener diode as a voltage reference. Its nominal voltage is 12 V which will make it spin at full throttle. 3-pin DC connectors also run at full power, but your motherboard can limit the voltage going to them, thereby altering the speed. There are also third-party programs that work on a variety of motherboards and allow wide customization of fan behavior depending on temperature readings from the motherboard, CPU, and GPU sensors, as well as allowing manual control. Habe mir einen neuen Schreibtisch samt PC Schrank gekauft. Prüfen Sie zunächst, ob Ihr Lüfter ordnungsgemäß arbeitet. It took me less than 15 minutes to build. Viel PC-Händler führen CPU-Lüfter vor, dar jeder Mensch verschiedene Töne als störend empfindet. 25kHz is used to raise the sound of the signal above the range of human hearing; use of a lower frequency could produce an audible hum or whine. The easiest way to adjust CPU fan speed is through the BIOS. Two such programs are SpeedFan and Argus Monitor. The voltage drop across the diode will fall with temperature, causing the fan to speed up. Made by CPUID who are also responsible for CPU-Z and PC Wizard, HWMonitor is a great tool for displaying the majority of your systems temperatures, fan speeds and voltages. They only cost a little more than regular PC fans.  The power rating should be noted and some diodes may require cooling to operate at their rated current. Also note that sometimes the ground ( – ) wire from the fan is not black, but blue. ELUTENG Lüfter USB 120mm PC Lüfter mit 3 Einstellbare Geschwindigkeiten,USB Ventilator 5V leise kompatibel mit Computer/PS4 /TV Box/AV Schrank/Router MEHRWEG. A clamp or vise to hold the switch will be handy; a pair of pliers can also be used. There a lots of devices in typical computers, which draw much more power out. Silent PC Review has been providing expert advice and detailed reviews of PCs and peripherals since 2002. This simple project describes how to rig up a switch that will let you feed 5 VDC to your fan(s) for low noise operation, and 12 VDC when more cooling is needed for hot weather or a bout of serious overclocking. This simple project describes how to rig up a switch that will let you feed 5 VDC to your fan(s) for low noise operation, and 12 VDC when more cooling is needed for hot weather or for a bout of serious overclocking ;). However, this is a potentially risky method, because +5 V PSU line is intended to source current only, not sink it, so the PSU is likely to get damaged in case of load on 5 V PSU line being below the load generated by 7 V fans (e.g. In computers, various types of computer fans are used to provide adequate cooling, and different fan control mechanisms balance their cooling capacities and noise they generate. To obtain 5V, the red fan wire goes to pin #4 (red), and the black fan wire goes to pin #2 or 3 (black). 120mm Case fans, Voltage question. 3 sets of values are displayed; the current values and the minimum / maximum values since the program was started. 4-pin PWM (pulse width modulation) can be dynamically controlled by software and hardware very easily. There are no real options as such, apart from a function to save monitoring or SMBus data to a text file. There are a few ways to perform this regulation, as described below. We're dedicated to providing top-notch advice and reviews for choosing your next PC build. Like other series regulators, the diode will dissipate power equal to its voltage drop times the current passing through it. Your email address will not be published. Posted: Thu Apr 28, 2005 12:21 am I have a fan … ARCTIC F8-80 mm Standard Case Fan, Very Quite Motor, Computer, Push- or Pull Configuration, Fan Speed: 2000 RPM - Black/White. Common voltage regulator ICs like the popular LM78xx series are sometimes used to provide variable or constant voltage to fans. One situation where a slower fan is definitely beneficial is when a CPU fan in an older machine needs replacing. ], is the manual fan speed controller. 15,69 € 15,69 € "pc lüfter 12v 2pin" Neuftech 120 mm PC Gehäuselüfter Netzteil Lüfter leise Kühler 2 pin DC 12V - rot. To obtain 7V, the red fan wire goes to pin #1 (yellow), and the black fan wire goes to pin #4 (red). While discrete regulators require additional components (a minimum of two transistors, three resistors and a small capacitor), they allow for arbitrarily high currents, allowing for the regulation of additional fans and accessories. Product Names Product Images Check Price #1 AC Infinity AXIAL 1225, Quiet Muffin Fan, 115V 120V AC 120mm x 25mm Low Speed, for DIY Cooling Ventilation Exhaust Projects View … Only 2 parts are required: a small toggle switch that cost $1.30 and a male IDE power connector (with pins pre-wired) that I had kicking around. Typically a fan can be driven between about 30% and 100% of the rated fan speed, using a signal with up to 100% duty cycle. The sensors of ATI … Get it as soon as Tue, Feb 23.  Adjustable versions like the popular LM317 also exist; when combined with a potentiometer, these adjustable regulators allow the user to vary the fan speed of several fans at currents far in excess of what a standard potentiometer could handle.. 12V headers operate via analogue signal and 5V headers are digital signals. Eventuell sind die Kabel defekt oder haben sich gelöst. As soon as you begin trying to quiet your PC, you realize how useful it is to be able to provide lower than 12 volts DC (VDC) to fans in the system. 17 posts knopix. Required fields are marked *. I had … © 2021 SilentPCReview All Right Reserved. That said, cooling fans come with a surprising amount of variation. The safest method of volt modding is connecting the +5 V power line to the +12 V input of the fan, which reduces the voltage the fan receives to +5 V. Some fans will not work at such low voltage at all, while some other fans may run at +5 V once they have started rotating at a reasonable speed. Most fans have 3 wires/pins. By connecting one or both wires to a different voltage, the voltage the fan receives will be different from the default 12 V the fan was designed for. The positive lead (+) is almost always red for all electrical or electronic components. Most modern motherboards feature hardware monitoring chips, which are capable of performing fan control, usually through the PWM method as described above. A soldering iron is recommended but not necessary if you use a switch with screw terminals. It’s probably wise to remove all the components from the case before drilling — or drill before installing any components. Electronic. (It is usually quite safe for a low wattage fan or two, but if you want to be perfectly safe, you may want to avoid the 7V tap.) by Mike Chin Unless you can find some sort of PCI/PCIE expansion card to provide a 5V header, it sounds like you will not be able to connect this product to your motherboard. Viewed 6k times 2 \$\begingroup\$ I have a 3 pin 12 V Fan, rated at 2000 RPM max. Posts: 174. Alibaba.com offers 472 pc fan voltage products. If the PC fan really does have has a brushed motor, then you can just control it with PWM. Since they must move more air through the same area of space, fans will become more noisy. ; updated Dec 14, 2003 (to include 7V information). Your email address will not be published. Unlike linear voltage regulation, where the fan voltage is proportional to the speed, the fan is driven with a constant supply voltage; the speed control is performed by the fan based on the control signal. Since fan noise increases with the fifth power of the fan rotation speed, reducing revolutions per minute (RPM) by a small amount potentially means a large reduction in fan noise. You can buy PWM-controllable PC fans. One to supply the voltage (red), another is neutral (black) and the other is used to control the fan speed (yellow). Interest has been growing in integrated circuits for controlling the speed of cooling However I don't like that, because the fan is making a lot of noise. The IDE pin numbers referenced are as shown in the previous IDE connector drawing. The Open Hardware Monitor supports most hardware monitoring chips found on todays mainboards. You can wire up several fans in parallel to the same switch — but watch that the ampere rating of the switch is not exceeded. If you have to drill, take care not to let the metal shavings get into your components. 4,4 von 5 Sternen 2.898. A wide variety of pc fan voltage options are available to you, such as application, certification, and type. Running 7V CAN sometimes be potentially stressful for the PSU for technical reasons I won’t go into here. A 3D illustration of six 80 mm fans, a type of fan commonly used in personal computers (sometimes as a set, or mixed with other fan sizes) A 30-millimetre (1.2 in) PC fan laying atop one sized 250 mm (9.8 in) A computer fan is any fan inside, or attached to, a computer case used for active cooling. leider ist das Problem, dass der Schrank komplett geschlossen ist. It took me less than 15 minutes to build & cost about $2. Another method of reducing the fan speed is by moving the 5 V wire in the classical Molex power connector in the place of the Ground wire going to the fan, thereby delivering +7 V (12 V − 5 V = 7 V) to the fan. The port that the fan connects onto the motherboard is known as the fan header. Previous Next J. joeflint82 Honorable. Sometimes all you want is to be able to switch between high and low speed. A PWM-capable fan is usually connected to a 4-pin connector (pinout: Ground, +12 V, sense, control). The method by which the software physically controls the fan is usually PWM (see above). , Learn how and when to remove these template messages, Learn how and when to remove this template message, http://www.diodes.com/datasheets/ds28002.pdf, "LM317 - Single Channel LDO - Linear Regulator (LDO) - Description & parametrics", "Thermal Considerations for Linear Regulators", "4-Wire PWM Controlled Fans Specification", "Review: SilentTEK - AOpen's mobo-embedded fan controller", "Intel® Desktop Boards - Intel® Active Monitor", "Quiet computing with BSD: Fan control with sysctl hw.sensors and lm(4) on OpenBSD and DragonFly BSD", "SpeedFan - Access temperature sensor in your computer", "Argus Monitor - Software to control CPU, GPU and System fans using any available PC temperature source", 4-Wire PWM Controlled Fans Specification v1.3, Why and How to Control (2/3/4-wire) Fan Speed for Cooling Electronic Equipment, Controlling fanspeeds in Linux on PWM motherboards, Thinkpads and ASUS Eee PC, https://en.wikipedia.org/w/index.php?title=Computer_fan_control&oldid=995673136, Articles needing additional references from April 2014, All articles needing additional references, Wikipedia introduction cleanup from December 2014, Articles covered by WikiProject Wikify from December 2014, All articles covered by WikiProject Wikify, Articles with multiple maintenance issues, Wikipedia articles in need of updating from December 2020, All Wikipedia articles in need of updating, All articles with specifically marked weasel-worded phrases, Articles with specifically marked weasel-worded phrases from December 2020, Creative Commons Attribution-ShareAlike License, Vcc (Power) – nominally a +12 V supply, though it may be variable depending on fan type and desired fan rotation speed, Sense (or tachometer) output from fan – outputs a signal that pulses twice for each revolution of the fan as a pulse train, with the signal frequency proportional to the fan speed, This page was last edited on 22 December 2020, at 07:22. Amazon's Choice for 9 volt fan. Dabei gingen die Meinungen über nerfende Töne sehr aus einander. Power supplies needed forced cooling, and power supply fans also circulated cooling air through the rest of the PC with the ATX standard. Cooling fans equipped with either two- or three-pin connectors are usually designed to accept a wide range of input voltages, which directly affects the rotation speed of the blades. Temperature inside the chassis is checked, and if an outside-of-range temperature is detected, fans are set to their maximum speed. Few PC components are so critical to the performance of your computer, yet so inexpensive than your PC fans. Pulse-width modulation (PWM) is a common method of controlling computer fans. when PC enters idle/sleep state). AW: Drehrichtung von Lüfter umkehren möglich? Hardware. This control method reduces noise issues and power requirements during periods of low usage, but when the system is operating at capacity, the fan noise can become a problem again. The signal wire measures how fast the fan is moving without any controls for the fan’s speed. Resistors in series with a fan's power pin are the simplest method of reducing fan noise, but they add to the heat generated inside the computer case. Since the voltage drop is proportional to the current, the fan may not start. What are the voltages on a 3-pin fan connector? This must be done cautiously, as excessive reduction in speed may cause components to overheat and be damaged. A three pin connector is basically power (5/12 volt), ground, and signal. 4.6 out of 5 stars 6,981. The Open Hardware Monitor is a free open source software that monitors temperature sensors, fan speeds, voltages, load and clock speeds of a computer. Top 10 Best Pc Fan Voltage On The Market . Überprüfen Sie ebenfalls sämtliche Verkabelungen des Lüfters. Control CPU Fan in the BIOS . I am trying to measure the current of a DC computer cooling fan (Intel E18764-001) at various voltages. About 0% of these are Fans & Cooling. For variable fan control, potentiometers could be used along with a transistor such as a MOSFET whose output voltage is controlled by the potentiometer. Most chassis fans run on 12v power. When thermally bonded to the computer's chassis, one of these ICs can provide up to 1 A of current at a voltage of 6, 8, 9 or 10 V for the LM7806, LM7808, LM7809 and LM7810, respectively. Peltiers or things with power consumptions running up to dozens of watts, require careful calculation of what goes out of the 5V lead and what’s going in there from the 12V lead. Laufrichtung Umkehren is in dem Sinn Sinnvoll, dass man den Lüfter nichmehr abbauen muss wenn man ihn mals saugend statt blasend machen möchte, Aber funktionieren tut es trotzdem nicht, habs getestet lüfter an 9 Vold batterie und nur nur mit einer Kabel Kombination gehts, also kabel einfach Polung tausche geht nicht. (Add up the amperage of the fans and ensure that the total is lower than the switch rating.). Save my name, email, and website in this browser for the next time I comment. Fans installed in a PC case can produce noise levels of up to 70 dB. The exact speed behavior (linear, off until a threshold value, or a minimum speed until a threshold) at low control levels is manufacturer dependent.. Active 4 years, 4 months ago. The photo below shows the switch with IDE “male” connector and fan, all soldered together and ready to go. The CPU temperature can be monitored by reading the core temperature sensors of Intel and AMD processors. There may be accessories you can buy, but sometimes, things like fan bays are overkill. connecting the −12 V or −5 V power line instead of the ground wire in the fan connector, and by connecting the 5 V power line in the +12 V input of the fan connector. Logic Supply CL100 Fanless Braswell NUC PC, AMD A10-7860K & Athlon 880K: Kaveri Refresh, 7263 Winchester Ave. West Bloomfield, MI 48322. These chips can be configured through BIOS,:§11.1 or by using specialised software once the operating system has booted. Modern hardware monitor chips, once configured, are capable of independently running this monitoring loop without any need for a functioning BIOS or an operating system. This is commonly accomplished by the motherboards having hardware monitoring circuitry, which can be configured by the end-user through BIOS or other software to perform fan control. With this type, fan speed is typically controlled by increasing or decreasing the voltage over the power wire. If you plug something between the 12V and 5V lead, you have to be absolutely sure, that no current is fed back into the PSU. A DPDT switch has three positions (2 polarities), and can switch two independent circuits at one time. Many companies now provide software to control fan speeds on their motherboards under Microsoft Windows or Mac OS X/MacOS. A diode in series with the fan will reduce the voltage being output to the fan. Not all fans or motherboards control or power the fan assemblies the same way. :§11.3 This may not be a problem until the system or the utility crashes, at which point the system may overheat due to the failure of the fans to maintain adequate cooling whilst running at reduced voltage and speed. Computer fans vary in size and voltage requirements. However, all the PC fans I have come across use brushless motors, which don't work very well if you PWM the supply voltage. Deciding on a cooling approach that matches your case and your components before you go shopping for fans and coolers can be helpful. Which means, that you need to have other loads on that 5V lead, which suck out more current than you feed to that lead from the 12V lead. , As modern PCs grow more powerful so do their requirements for electrical power. 100mA are sucked out of the 5V lead, 100mA come from the 12V lead and 200mA go to ground. There may be accessories you can buy, but sometimes, things like fan bays are overkill. Any desktop PC with standard case fan mounts will work (80mm, 120mm, 140mm, 200mm—it doesn’t mater as long as they’re consistent). As with other linear regulators, the waste heat that is produced will be roughly P = (Vin - Vout) Iout.. The common cooling fans used in computers use standardized connectors with two to four pins. 49 $6.99 $6.99. In this style of fan control, the fan is either on or off. Fan control is the management of the rotational speed of an electric fan. For example: Your fan uses 100mA at 7V. The switch will toggle the fan between 12VDC and 5VDC. In this style of fan control, the fan is either on or off. That’s it. Many motherboards feature firmware and software that regulates these fans based on processor and computer case temperatures. The control signal is a square wave operating at 25 kHz, with the duty cycle determining the fan speed. Just plug the male IDE connector to a spare from the power supply. Enjoy. Eine einfache Lüfter-Regelung besteht aus zwei Kabeln. A silicon diode provides a relatively constant voltage drop of about 0.7 V per diode; data sheets for a specific diode specify its voltage drop, for example the 1N4001 silicon diode's voltage drop varies from approximately 0.7 to 0.9 V as the current varies from 0.01 to 1 A. Top 10 Best Pc Fan Voltage Reviews Of 2021. The byproduct of increased heat generation is that the fan(s) need to move increasing amounts of air and thus need to be more powerful. The images below explain more clearly. To obtain 12V, the red fan wire goes to pin #1 (yellow), and the black fan wire goes to pin #2 or #3 (black). Große Auswahl an PC Lüfter auf dem Conrad Marktplatz Gratis Lieferung ab 59,50 € Bis zu 3 Jahre Garantie mit kostenloser Kundenkarte möglich So habe habe ich meinen CPU-Lüfter gekauft, der Verkäufer und 2 weitere Kunden waren dabei und nach drei hörtest habe ich den für, mich am leisten CPU-Lüften entschieden. Since usual fans only use 1…3W, you are usually perfectly safe with using the 7V trick there. The red and black lines represent the wires from the fan. 4,3 von 5 Sternen 451. Damit sorgen sie für ein Nachströmen kühlerer Umgebungsluft und somit für die notwendige Kühlung der Elektronikkomponenten. Check it out here. It should provide some information as to the manufacturer, the size of the fan and the direction of airflow. In which case you should move on to the next method. By varying the voltage input across the acceptable range for a fan, the speed of the fan will increase (to added voltage) and decrease (to reduced voltage); a faster fan means more air moved and thus a higher heat exchange rate. March 26, 2002 When the temperature drops below a threshold again, the fans are turned back off. You will also need a soldering iron or gun and wire strippers or cutters. Undervolting PC Fan from 12V to 7V. It is possible to use a rheostat instead. Ist dies nicht der Fall, empfehlen wir Ihnen, den Lüfter schnellstmöglich auszutauschen um weitere Schäden am Computer zu vermeiden. October 29, 2019 November 20, 2004 Jack Sparrow Leave a Comment on Top 10 Best Pc Fan Voltage Reviews Of 2021. PC-Lüfter: Die PC-Lüfter (öfters auch als Computer-Ventilatoren bezeichnet) transportieren durch ihren erzeugten Absaugluftstrom die Wärme aus dem Rechner. Components . The easiest way to determine what fan you need to replace your existing chassis fan is to remove it and check the markings on it. Nov 30, 2012 67 0 10,630 0. The picture below shows how the various voltages can be obtained: Note that the pins on the IDE power connector are not colored; the wires that lead to them are. If you have a different fan (or whatsoever), that sucks out 200mA from the 5V lead and feeds them to ground, you’re fine. Dec 12, 2012 #1 I currently have three stock 120mm case fans, one as an air intake, one as an exhaust, and one on the side (that I am considering leaving off). Fans are usually the noisiest items found in a computer, and often run unnecessarily fast - a 1.5GHz Athlon may well need the fan to be turning at 4,500 rpm, but a lesser machine with a good quality heatsink probably doesn't. The sense pin is used to relay the rotation speed of the fan and the control pin is an open-drain or open-collector output, which requires a pull-up to 5 V or 3.3 V in the fan. The first two pins are always used to deliver power to the fan motor, while the rest can be optional, depending on fan design and type: The color of the wires connected to these pins varies depending on the number of connectors, but the role of each pin is standardized and guaranteed to be the same on any system. Here’s a photo of my setup, inside and out. The image on the left is a typical switch; the image on the right is the wiring diagram for this 12V / 5V switch. Temperature inside the chassis is checked, and if an outside-of-range temperature is detected, fans are set to their maximum speed. Also, if you couldn’t locate any fan settings in your BIOS, to begin with, this means that your motherboard probably doesn’t support this option. Möchtet ihr die Lüfter runter- oder hochregeln, geht das am schnellsten mit der kostenlosen Software SpeedFan. Most PCs don’t provide any way to control the speed of the fans.