PWM vs DC fans: Which should you buy for PC cooling
If you’ve built a PC in the last few decades, you’ve almost certainly come across a 3-pin (or even 2-pin) DC fan or a 4-pin PWM fan (if not both) when setting up the cooling inside your case. And since you can connect a 3-pin fan to a 4-pin header or a 4-pin fan to a 3-pin header and the fans will spin, that may lead you to wonder what the difference is between the two and which is better....