How Does A CPU Cooling Fan Work?


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The basic need of the CPU cooling fan is to dissipate heat generated by the processor and other parts of the motherboard. If you do not keep the CPU (or any other component) within operating temperatures, then you risk damaging the CPU (or other parts). It is valid to run the fan only when the CPU is hot, but doing so will reduce the lifespan of the motherboard, chipsets, and processors. As the ideal temperature to maintain them is around 20 to 25 degrees.

How Does A CPU Cooling Fan Work?
How Does A CPU Cooling Fan Work?

Working Of A CPU Cooling Fan

Positive airflow is essential to keep all components of the computer cooler. A mid-tower case has less air cooling volume than a full tower ATX case, meaning that maintaining good airflow is more critical with the former.

If one is using the CPU for calculation-intensive process or high graphic utilization (Eg. Gaming and Video processing), it is expected that the processor and other parts will heat up considerably. So a continuous running of CPU fan will dissipate the heat gradually and continuously, which will improve the life span of the CPU.

In a well-designed computer case, the positioning of the fans exists for a specific purpose. First, remember that these high-end cases have designs to function with all the panels in place. If you can increase the fan speed depends on the hardware, and if the BIOS or firmware accommodates settings.

Most HPE ProLiant Servers have settings crank up the fans if the temperature approached and exceeds thresholds. Fifteen years ago, the BIOS ON higher-end Asus and MSI motherboards included parameters that indirectly could throttle fan speeds if the temperature reached limits.

The front case fan works to cool the hard drives and the peripheral cards mounted on the motherboard. The massive, high-capacity front fan intakes the air and blows it out the rear vents, assisted by the rear exhaust fan. The fan on the side panel is over the heat sink-fan. It directs cooling air on to the radiator fins of the heat sink. The heat sink fan exhausts the warmed air from the radiator via the rear case fan along with, if one is installed, an exhaust fan at the top of the computer case.

How Does A CPU Cooling Fan Work?
How Does A CPU Cooling Fan Work?

Temperature Control

If CPU and GPU temperatures are okay, then there is absolutely no reason to have any case fans installed. Research your CPU and GPU to find normal/maximum temperatures. Use a program similar to CPUID HW monitor to measure your temps with and without your fans at an identical load, and identical room temps. If temps are still beautiful, then you can do what you want. The problem with leaving the side panel open is dust, insects, rodents, reptiles, small children, etc. Just remember, the higher the temps, usually, the shorter the life.

How Does A CPU Cooling Fan Work?
How Does A CPU Cooling Fan Work?

The fan serves an essential purpose, which is to keep the CPU within temperature specs. When the CPU is working very hard, as with gaming, the temperature sensor will detect that and spin up the fan accordingly to properly cool it.

If you cannot or will not change anything, then the only option is not to stress out the CPU, which means you need to adjust your gaming settings to low-performance settings to keep the fans from going high speed.

As a side note, however, if you are finding your CPU cooler to be too loud, you should consider upgrading it, changing the fan, cleaning out dust, and changing the thermal paste.

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