How Big Should The Fan In A Power Supply Be?
There is always the question about how big the size of the fan should be in a power supply. Mostly people will answer you shortly like this: the larger the fan the better the performance and the quieter it is. This is unfortunately not entirely true due to the fact that also small 80 mm fans can sufficiently cool a power supply and it doesn’t even need to get too noisy. With today’s power supplies it always depends on the overall cooling concept. Of course larger fans will transport a larger amount of air while rotating slower in comparison with a smaller fan. This means that a larger fan needs fewer rotations to transport the same amount of air compared to a smaller one which makes it much calmer. The advantage of larger fans is that the airflow is easier to reach in all corners of the power supply i.e. reaching the components easier. The disadvantage is that the fan is mounted on the bottom and the air needs to be redirected by 90° to get out in the back. A 80 mm fan doesn’t have thi
