A case fan's ability to generate airflow is one of its most important attributes. CFM, or cubic feet per second (CFM), is a unit that measures the airflow through an opening. CFM ratings higher than 1 mean that more airflow is generated, which reduces temperatures and improves performance.
Case fans that provide a lot of airflow but are very quiet are the most in-demand. You need to consider what type of fan you want, how noisy it is, and your budget.
For example, if you are looking for a fan that produces the most airflow for your money, the Noctua NF-A14 PWM 140mm case fan is a great option. It has a PWM connector, and comes with a 3-year warranty. It also features swappable corner panels in different colors, making it one the most customizable options available.
The ARCTIC F12PWM rev.2 is another high performance case fan worth looking into. The ARCTIC fan has a 53 FCM airflow which is a great amount of flow. Despite the high airflow, the ARCTIC fan F12 is quite noisy. The fan can be turned off by turning off the PWM function, which allows it to run at a low rate of speed.
ARCTIC F12 is a high-performance device with a low noise level. It can operate at a slower speed to reduce its impact on system performance, with a noise level just below 36 dBA. The fan's PWM function allows your motherboard to regulate the speed of the fan.
Silent Wings 3 is another fan which produces significant airflow and has a price that is reasonable. It has a 6-pole motor but can produce over 100 square feet of airflow. This is much more than you would expect from a smaller fan. However, the case fan makes less noise than an ARCTIC one.
Silent Wings 3's impressive airflow capabilities are not the only thing that is noteworthy. This includes a focussed flow frame, which helps to concentrate airflow and reduce noise. It has 11 stator guide vanes as well as a sixpole motor and power lead.
Rosewill 120mm Long Life Sleeve. It has the highest airflow volume of any top-of-the-line fans. It circulates more air than any other fan and cools your computer faster than any other. Rosewill 120mm Long Life Sleeve, despite its small dimensions, has a maximum RPM value of 2000. The RGB lighting is the most striking feature of the Rosewill 120 mm Long Life Sleeve. While it's not an essential feature, it's still a fantastic feature.
Whatever model you choose you'll need screws and a power supply. While most models have these included, some models will need you to either connect jumpers or use an additional fan controller.