First check the size of the fan that can be installed on the rear panel of your case (under the power supply). Generally, the case can be equipped with an 8cm or 9cm case fan, and some better case fans can be equipped with a 12cm fan. The bigger the fan size, the better, but you must first measure the size and compare the size before installing it. The fan in this position is for exhaust (blowing outward), so that the correct air channel can be formed from bottom to top or front to back. .
We recommend the overclocking 3 case fan, which is quiet, of good quality, and has a large air exhaust volume. Remember that the air of the overclocking 3 case fan blows toward the side with the trademark on it.