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• 120mm x 120mm x 25mm indicates the fan's dimensions, with the 120mm being the width and height, and 25mm being the thickness or depth. This size is standard for most case fans in desktop PCs and serves as an excellent balance between airflow and noise.

• This fan operates at 12V DC, which is commonly used in computer cooling systems, electronic devices, and appliances. It can be powered either by a dedicated 12V power supply or from a PC motherboard’s fan header (often through a 4-pin PWM connection for speed control).

• Due to its larger size and powerful design, these fans can provide significant airflow, typically ranging from 50 to 100 CFM (cubic feet per minute) depending on the specific fan model.

• High airflow helps keep components like CPUs, GPUs, and other electronics cool, particularly in systems with high-performance components that generate more heat.

• Larger fans like the 120mm x 120mm x 25mm tend to be quieter compared to smaller fans due to their larger blades moving air more efficiently at lower RPMs.

• Noise levels can vary, typically ranging from 20 to 30 dBA, which is relatively quiet for larger fans. However, the fan's noise level will depend on the design, speed, and bearing type.

• Many 12V DC 120mm cooling fans are equipped with PWM (Pulse Width Modulation) control, allowing you to adjust fan speeds depending on the system's temperature or load.

• RPM typically ranges from 1,000 to 2,500 RPM for most models, with higher-end fans potentially reaching even higher speeds for increased airflow.

• The fan is usually mounted with screws or rubber mounts to reduce vibration noise and increase stability. Most PC cases or electronic enclosures designed for 120mm fans will have compatible mounting holes.