Some fans may have a 4 pin connector but only 3 wires going into the back of the connector.
													
																	Case fan 3 pin to 4 pin. 
									
	
		
	
																	Noctua nf a14 pwm premium quiet fan 4 pin 140mm brown type. 
																	Free shipping on your first order shipped by amazon. 
																	Do not use it for standard 4 pin rgb or 5 pin rgbw devices. 
																	This is still considered a 3 pin fan. 
															
													
									
	
		
	
																	Case fan accessory color. 
																	This cable is designed for 3 pin addressable rgb led fans and addressable rgb capable motherboard only. 
																	Identifying fan type 3 pin or 4 pin pwm. 
																	A four pin connector is a little different than the three pin connector since it has the extra fourth wire used for controlling and sending signals to the fan which likely has a chip on it that tells it to slow down or speed up in addition to the other wires the three pin connector has. 
															
													
									
	
		
	
																	1500 rpm 1200 rpm with l n a adapter 300 rpm mini rotational speed air flow. 
																	140 2 m3 h standard 115 5 m3 h w l n a. 
																	Cooler master addressable rgb 1 to 3 splitter cable with gigabyte 3 pin argb adapter. 
																	Sso2 bearing self stabilising oil presure bearing rpm. 
															
													
									
	
		
	
																	Threebulls 2 pack 4 pin pwm fan splitter cable sleeved braided adapter computer pc fan power extension cable 1 to 3 converter for computer atx case 4 pin 3 pin cooling fan cable 10 6 1 to 3 4 6 out of 5 stars 113. 
																	A 4 pin pwm fan connector will have four square holes on the front and four wires entering the back.