![]() ![]() The third wire provides feedback on the actual RPM of the fan. It is for those who want all of their information presented without fuss or favor. Fans with 4 wires are controlled through pulse width modulation (PWM), in theory a more efficient way of controlling the fan speed. Speedfan is probably the most popular fan control software and is also free. See Lm_sensors for generic details.įans with 2 or 3 wires may have voltage regulation: higher voltage (typically up to 12 Volt) results in higher rotation per minute (RPM). Specific hardware may have specific needs with respect to kernel configuration. Fans that allow their speed to be controlled.A motherboard capable of regulating fan speeds.A BIOS that allows users to control the fan speed.I think there is currently no minimum fan speed for cpu, but both 0 and 25. Higher temperatures cause more wear on the electronics, resulting in a shorter lifespan.Ĭontrolling fan speed is not supported on all computers. What youre observing is likely the increased cooling for the HDD drive.What if the program controlling the fans fails? The computer could overheat and parts could be destroyed.There are two risks when manually controlling fan speeds: ![]() It is generally considered more safe to have the BIOS or dedicated hardware control the fans. ![]()
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