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Pc case fan power connector.
Say hello to your front panel cables.
Desktop board has a 4 pin fan header.
When connecting a three wire fan to a four pin fan header the fan is always on.
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The three wire connectors are for small chassis fans with lower power consumption.
Fans and on board fan headers are backwards compatible.
Next press down until the fan connector until it is fully connected to the motherboard header.
As you can imagine these are the corresponding connectors for the power button and its corresponding led light if your case has one reset switch and your hdd light.
The fan connector will have two guides 1 and these will need to line up with the tab 2 that is on the motherboard fan header.
The four wire connectors are for processor fans with higher power consumption.
There is no fan control.
Proper fan connector placement is shown in the figures below.
Computer fans commonly come in standard sizes and are powered.
The simplest pc fan requires just two wires one wire provides power 12v and the next.
3 pin connectors are usually used for the smaller chassis fans with lower power consumption while 4 pin connectors are usually used by cpu fans with higher power consumption.
Most cooling fans will connect to a pc with a standard connector of some sort.
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Both axial and sometimes centrifugal blower squirrel cage fans are used in computers.
Note that chassis and cpu fans may use either 3 pin or 4 pin power connectors.
Modern systems will typically use 3 pin or 4 pin dedicated fan headers though standard molex 4 pin peripheral.
When using a 3 pin power connector with a 4 pin fan header the fan will always be on.
Fan has a 3 pin power connector.
A computer fan is any fan inside or attached to a computer case used for active cooling fans are used to draw cooler air into the case from the outside expel warm air from inside and move air across a heat sink to cool a particular component.
A four wire fan.
There is no fan control.