Standard size CPU fans are widely used in a large number of computer systems. The most common standard size is 120mm, which has become a staple in the computer hardware industry. These fans are designed to fit into standard computer cases and motherboard mounts without any compatibility issues. They offer a balanced combination of airflow and static pressure. The 120mm size allows for a relatively large blade surface area, which in turn enables the fan to move a significant amount of air. This is crucial for cooling the CPU effectively, especially in mid-range to high-end systems where the processor generates a considerable amount of heat.

The design of standard size CPU fans is often optimized for noise reduction as well. Manufacturers use techniques such as aerodynamic blade shaping and high-quality bearings to minimize the sound produced during operation. For example, sleeve bearings are commonly used for their quiet operation, although they may have a shorter lifespan compared to some other bearing types. Ball bearings, on the other hand, offer better durability but can be slightly noisier. Many standard size CPU fans also come with features like vibration dampening mounts, which further reduce the noise transmitted to the computer case. In terms of power consumption, these fans are usually designed to be energy-efficient, drawing only a modest amount of power from the motherboard. They are available in both PWM (Pulse Width Modulation) and non-PWM versions. PWM fans allow for more precise speed control based on the CPU temperature, while non-PWM fans have a fixed or manually adjustable speed.  standard size CPU fans provide a reliable and cost-effective solution for CPU cooling in a wide variety of computer setups.