Chris 🇹🇼 | Telegram 尼有事嗎 says to YSITD3-pin is controlled by increasing the voltage, you can connect a 3-pin to a 4-pin header and change the setting in the BIOS to control with voltage instead of PWM. 4-pin has a fourth pin for control via PWM, some CPU coolers use 3-pins like Noctua, they claim that voltage regulation is better than Pulse-width modulation but who cares.at Tue, Aug 16, 2016 8:48 PM