Computer Fans

Computer Fan Assemblies

 Computer fan assemblies are crucial components in maintaining optimal temperatures within a computer system. They come in various types and configurations, each designed to meet specific cooling needs.

Types of Fan Control

PWM (Pulse Width Modulation)

 PWM fans allow for precise control of fan speed by adjusting the duty cycle of the power signal. This enables the fan to operate at varying speeds based on temperature requirements, leading to improved efficiency and quieter operation. Typically adjusted via fan controllers, bios settings or fan control software. Some larger commercial equipment rely heavily on PWM fan designs forcing air across or from a rack assembly to vent it into a heated isle to be cooled by room conditioning.

Constant Speed Fans

 Constant speed fans operate at a fixed RPM (revolutions per minute). They are straightforward in design and typically provide consistent airflow but may be louder than variable speed options. Typically these fans require less pin outs (typically 2) as its power in and power out configuration. Additionally in most circumstances they are cheaper.

Quiet Operation

 To achieve quiet operation in computer fans, consider the following factors:

• Fan Size: Larger fans can move more air at lower speeds, resulting in quieter operation.

• Quality Bearings: Fans with fluid dynamic or magnetic bearings tend to produce less noise compared to sleeve bearings.

• Fan Design: Look for fans designed specifically for quiet operation, often featuring optimized blade shapes and noise-dampening materials. A major contributor to quiet fans that we are familiar with is Noctua with their wonderful classic beige and brown construction.

Proper Cleaning Rules of Thumb

 Maintaining clean fans is essential for optimal performance and longevity. Follow these rules of thumb:

• Frequency: Clean fans every 3 to 6 months, or more often in dusty environments.

• Power Off: Always power down and unplug the computer before cleaning.

• Use Compressed Air: Use compressed air to blow dust out of the fan blades and housing, ensure to hold the fan from spinning while dusting.

• Soft Cloth: For stubborn grime, use a soft, damp cloth to wipe down the fan surfaces.

• Avoid Liquids: Do not use liquids directly on the fan or electrical components.