If you connect the 4 Pin fan connector to a 3 Pin header, then the fan will run at maximum RPM.Ģ. If you want to use the PWM function then the 4 Pin fan must be connected to a 4 Pin header on the motherboard. Please Note: You can connect a 4 Pin Fan to a 3 Pin or 4 Pin header on the motherboard. Installing a 4 Pin fan to the motherboard: Next, press down until the fan connector is fully connected to the motherboard header. 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.Ģ. The fan will function normally no matter type of fan header is used.ġ. Please Note: You can connect a 3 Pin Fan to a 3 Pin or 4 Pin header on the motherboard. Installing a 3 Pin fan to the motherboard: The image below displaying is the difference between a 4 Pin PWM fan connector (Left) and a 3 Pin fan connector (Right) It will also have three square holes on the front and three wires entering the back.
A 3 pin fan connector will be smaller in size than the 4 pin PWM fan connector.
A 4 pin PWM fan connector will have four square holes on the front and four wires entering the back.Ģ. Please Note: Some fans may have a 4 pin connector but only 3 wires going into the back of the connector. Identifying Fan Type (3 Pin or 4 Pin PWM):
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