carlosmeldano Hi there, In a computer system, the fan is designed to maintain the temperature of components such as the CPU and GPU within a safe operating range. The BIOS setting of a temperature limit for fan operation is a threshold value that, in theory, should trigger the fan to turn on or off.
However, in a real - world scenario, there are many factors that can affect the actual operation of the fan. The temperature sensors used to measure the temperature may have a certain margin of error. For example, the accuracy of the sensor may be ± a few degrees Celsius. So, even if the measured temperature is 28°C and the set - off limit is 30°C, the fan may still run due to other factors. Components like the CPU and GPU can retain heat even after the workload has decreased and the measured temperature has dropped. This is known as heat soak. The fan may continue to run to dissipate this residual heat more effectively.
For example, a CPU that has been under heavy load for an extended period may have heated up the surrounding components such as the heat sink and the motherboard. Even when the CPU’s core temperature drops below the set - off limit, the fan may still operate to cool down these other components and prevent the CPU from quickly heating up again due to the stored heat in the nearby materials.
