Name: CPU 4pin down speed line.
Interface: standard 4 needle (male head — female head)
Applicable: reduce the fan noise of the corresponding interface (3 pin /4 pin fan is available, and no temperature control function is used when connecting 3 pin fans)
Slow effect: different impedance fans may be different, about 30% to 70%, suggest to buy a few more, go back to spare, more with can connect, the more of the series, the lower the speed effect.
Features: heat-shrink-wrapped package, 47 ohm resistance, all-copper high quality wire, environmental dupont plug.
Slow down the principle and effect: the fan in the power supply 12 v dc series resistance, increase the size of the resistance in the circuit, to reduce the size of the current goal, to reduce the speed of the fan, concrete to reduce the numerical, according to the fan itself resistance is different, there will be different.
4 needle temperature control fan, use this speed line, can reduce fan speed, still can support PWM temperature control, very good!