Personally I'd just cut the inner alignment tab off.
In which case you could transfer the housing from the old fan onto the new one, or buy a new housing (Molex 22-01-3047 or equivalent). If you feel happy enough the pinout is correct, one option is you could modify the connector on your new fan with a knife or some snippers (just remove the alignment tab that's in the way.).Īlternatively, it's relatively easy with a tiny jewlers screwdriver or other thing flat object to press into the little holes on the back side of the connector and gently pull the wires out. The PWM input to the fan should also be high-z with no pull-up, so should cause no damage. It should be +12V on yellow relative to GND on black.īeyond that, the PWM/Tacho pin should be pretty low risk of damage if they are not right - the output of the fan is open drain with no pull-up, so can only pull to ground. You could test this by measuring the voltage between the yellow and black wires. While it is just a guess, it appears they've used the standard pinout. I guess they didn't want anyone to be able to connect 3-pin fans to it, as to why, who knows. The motherboard controls the speed of PWM fans according to temperature. With a DC-controlled fan, the fan speed is regulated by the board powering it with lower or higher voltages (say, between 3V and 12V) instead of steady 12V.
A 4-pin plug means it's PWM (pulse width modulation) controlled. This is as opposed to the standard fan connector which is a modified version with alignment pin designed to allow both 3-pin and 4-pin fans. What s a PWM Fan PWM fans are very similar to DC fans but differ in one key. A three-pin plug means the fan is DC ( direct current) voltage-controlled. F120mm fans are high airflow fans that provide the ideal balance between airflow and static pressure. Looks like they've just used a regular Molex 4-pin KK connector. NZXT F120 RGB 3IN1(White) PWM Airflow Fans & Controller w/ Smart Frame Design & Anti-Vibration Rubber Corners: This bundle contains three F120 RGB fans and a RGB controller.
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