The third wire provides feedback on the actual RPM of the fan. Method 1: Check CPU usage Method 2: Clean air vents Method 3: Close Applications Method 4: BIOS update and power manager (if BIOS/EC thermal control logic. Fans with 4 wires are controlled through pulse width modulation (PWM), in theory a more efficient way of controlling the fan speed. 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). Drivers & Downloads You could download / install latest Dell Power Manager Service from your Drivers & Downloads page and then use the application to see if it will help with the heating problems. Specific hardware may have specific needs with respect to kernel configuration. It is used to resolve fan noise, overheating, and performance- related issues of the system. Based on the description of PWM (Pulse Width Modulation), the higher setting must be higher power applied to the fan motor for higher fan speed and more frequent intermittence between stopped and running state which should translate to cooler running CPU. Fans that allow their speed to be controlled Options are: 0.75 PWM value / C 2.50 PWM value / C.A motherboard capable of regulating fan speeds.A BIOS that allows users to control the fan speed.Options are from 20 to 100 percent in 10 percent increments. Higher temperatures cause more wear on the electronics, resulting in a shorter lifespan.Ĭontrolling fan speed is not supported on all computers. Fixed: Allows the fan speed to be set at a fixed speed and never change.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: Just like SpeedFan’s fan speed curve, the graph represents fan speed and temperature. It is generally considered more safe to have the BIOS or dedicated hardware control the fans.
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