# Converting 5v PWM Noctua NF-A8 to 12v

I bought two fans for my PC case, but I accidentally ordered the 5V version of the fans. The box states that CAN'T be run on 12v of regular Motherboards or the'll die.

I happen to have a step-down voltage converter that can handle 12v and I can regulate it to 5v. So, with a little soldering I can solve my problem. My doubt is about that the fans are PWM and I intend to preserve that functionality.

I thought of connecting the +12 and GND to the buck converter and the PWM and TACH directly to the motherboard. I'm almost certain that it's OK to do it, but I want to be a 100% confident. I'm not sure if the TACH and PWM from a regular motherboard will have higher voltages than this fans actually supports.

Am I safe doing this?

PS: If you're wondering why I don't return the fans the answer is: Argentina.. shipping and custom taxes are more expensive than the fans itself and I bought the fans overseas..

• the red wires from an ATX power supply carry 5 V wow... Why I didn't think about that on the first place haha. Thanks man!