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Notebook fan controller5/31/2023 The PWM has 4 wires, 1 for power, 1 for speed control, 1 for speed feedback, and 1 for ground. ![]() ![]() When it’s CPU overheats, the frequency drops from 3.2GHz to 2.4GHz, causing performance drop.Īnother problem is that when it’s overheated, the fan doesn’t run at full speed (I will talk about it later), it simply just run at a higher speed.īoth Speedfan and NBFC (2 major fan controller apps) don’t support my laptop, which means I can’t control the fan from application layer.īut! The fan is powered and controlled via PWM cable. So I have an old gaming laptop, which has one significant problem. Below is just some talk about the CPU and the fan. If you are in a hurry, just skip to the Principle. This is especially useful if your computer isn't supported by any fan control software, and you want your fan to spin faster than your fan control firmware asks it to prevent your CPU from overheating. This Instructable is about how to let your computer’s fan run at full speed (refer to the Principle down below) and return fan control to the system or motherboard when you want to.
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