If the surrounding air is too hot, the components inside the case will not be able to effectively dissipate heat. Case Fanįans are used to pass air through the computer case. Applications of Computer FanĪfter getting some basic information about the PC fans, this part will list some applications of the computer fan.
#Large pc fan sizes manual#
Users can even supplement this function with additional cooling components, or connect a manual fan controller with a knob to set the fan to different speeds. The computer’s BIOS (basic input/output system) can control the speed of the computer’s built-in fan system. Fan control is not usually an automatic process. To cool these components, a fan is used to remove the hot air from these components.įans connected to the components are often used in conjunction with heat sinks to increase the area of the heated surface that is in contact with the air, thereby improving cooling efficiency. In early personal computers, natural convection (passive cooling) was used to cool most components, while many modern components require more effective active cooling. Computer fans usually use standard sizes and use 3-pin or 4-pin fan connectors for power supply and control.
When using this method, you may find it necessary to disable any fan warning settings in your motherboard BIOS, since the motherboard may incorrectly believe that its CPU fan has failed when the fan is connected to a fan controller rather than directly to the motherboard itself.Tip: If you want to know more things about the computer hardware device, then it is highly recommended you go to the MiniTool website.Īxial fans and sometimes centrifugal (blower/squirrel cage) fans are also used in computers. Several models are available now which provide 4-pin fan headers, so this is an easy way to use 4-pin PWM fans in a PC system which has only 3-pin fan headers on its motherboards. This problem also occurs if you try to use an in-line fan speed controller such as the one made by Gelid.Īnother avenue to explore is the possibility of using a bay-mounted fan controller. The only other problem to consider is that occasionally, components immediately adjacent to the motherboard fan header can get in the way of the larger 4-pin fan connector, physically preventing connection.
#Large pc fan sizes full#
The fan will potentially run at full speed, so if you would like to reduce the speed of the fan you will need to adjust the fan speed setting in your BIOS or use fan control software such as SpeedFan in Windows. So you can plug the 4-pin fan connector onto the 3-pin motherboard fan header, leaving the fourth pin not connected to anything. Screw hole spacings and fan sizes 32mm between screw holes:Įlectrically, there is no problem doing this - the fourth pin on the fan cable is used purely for PWM control and is not needed in order for the fan to run. Note that the mounting hole measurements shown below are taken horizontally or vertically between the holes and not diagonally. If you know the distance between the fan mounting screw holes but don’t know what fan size to order, please see the following table. If you have any questions about which fan you should order, please don’t hesitate to get in touch. All our fans are 25mm thick unless otherwise stated. This isn’t really dictated by customer preference, but more by recent designs of PC cases.Īs for the thickness (depth) of the fan, generally 25mm (1 inch) is by far the most common depth, although smaller fans can have shallower depths such as 15mm or even 10mm. The sizes of all the fans on our website are shown as measured along any one of the fan’s four sides, NOT the distance between the fan’s screw holes! Our most popular fan size is 120mm, followed by 80mm. The size of fan you need will generally be determined by the size of the fan fitting position in your PC case.
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