Some motherboard models may only allow DC control for some of the fan headers, even though they can all be 4-pin headers. So for each fan, you have to select the right fan control method: DC for a 3-pin fan or PWM for a 4-pin fan. Side note: The "RPM Speed Signal" pin (rotations per minute) in the picture is telling the motherboard at which speed the fan is spinning, it is not controlling the fan. With a PWM-controlled fan, the board powers it with a steady 12V, and the fan speed is controlled through the fourth pin via a PWM signal. With a DC-controlled fan, the fan speed is regulated by the board powering it with lower or higher voltages (say, between 3V and 12V) instead of steady 12V. A 4-pin plug means it's PWM (pulse width modulation) controlled. Replacements for most laptop models can usually be found on Ebay for fairly cheap.īad-Motha lähetti viestin:U can't control the CPU/GPU Fan simple as that, it has a hardcoded firmware based preset within the BIOS that controls the fan speed curve, based on temps.A three-pin plug means the fan is DC (= direct current) voltage-controlled. > If your laptop is no longer under warranty, consider buying a replacement Heatsink+Fan on your own, and replacing it along with the thermal compound. This can often fix the issue in some cases. > If you run into an issue where the fan doesn't seem to change to higher RPMs as the temps rise above 60-70*C or so, what most OEM suggest here is to download and install (or reinstall) the latest available BIOS version for your exact laptop model.
> If your laptop is under warranty from the manufacture, contact them and have them replace the heatsink+fan+thermal paste if this is failing. Even if the intake area looks cleaned, there could be dust build-up elsewhere. In most laptop desgins, the fan usually only lasts about 1-2 years in most especially when actually used for gaming an the fan gets used alot at those higher RPMs, the fan will wear out, simple as that. If your system is Intel / NVIDIA mixed setup and is having random issues when not reaching 95*C or above, then most likely it is an issue with your Heatsink/Fan/Thermal Compound. U can't control the CPU/GPU Fan simple as that, it has a hardcoded firmware based preset within the BIOS that controls the fan speed curve, based on temps.
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