Only those with the proper circuitry to adjust speed to temperature will change speed automatically. CPU fans rely on temperature feedback from the CPU itself to adjust speed. There are some motherboards with case fan ports which can used speed governed fans. You can also buy fans with speed selector switches to adjust the fan manually. There are also remote controlled fan speed options so I'm afraid there's no one answer to your question.
Hi all, I am planning on building a PC and I was wondering...
Do fans inside a PC speed up automatically? I have a laptop that has fans that will speed up when I play a game or watch a movie, but do I have to install a heat sensor or something? Or should I get a fan controller?