Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your ARCTIC P12 Pro PST 120mm PWM Fan 5-Pack. These fans are designed for high static pressure applications, featuring a wide PWM speed range, a fluid dynamic bearing, and Power Sharing Technology (PST) for simplified connectivity. Please read this manual carefully before proceeding with installation.

Image: The ARCTIC P12 Pro PST 120mm PWM Fan 5-Pack, showcasing five black fans with the ARCTIC logo.
Package Contents
Verify that all items are present in your package:
- 5 x ARCTIC P12 Pro PWM PST 120mm Fans (Black)
- Mounting Screws (20 pieces)
Setup
1. Mounting the Fans
The ARCTIC P12 Pro PST fans can be mounted in various locations within a computer chassis or on radiators. Ensure proper airflow direction for optimal cooling. The fan blades typically indicate the direction of airflow, and an arrow on the fan frame often indicates the direction of rotation and airflow.
- Identify the desired mounting location (e.g., case intake/exhaust, CPU cooler radiator, GPU radiator).
- Position the fan with the desired airflow direction.
- Secure the fan using the provided mounting screws. Tighten screws evenly to prevent warping.

Image: Multiple ARCTIC P12 Pro PST fans installed within a computer case, demonstrating typical mounting positions for cooling components.
2. Connecting the Fans (PWM PST)
The P12 Pro PST fans feature a 4-pin PWM connector and Power Sharing Technology (PST), allowing multiple fans to be daisy-chained from a single motherboard fan header.
- Locate an available 4-pin PWM fan header on your motherboard.
- Connect the main 4-pin PWM cable from the first fan to the motherboard header.
- For additional fans, connect the 4-pin PST connector from the first fan to the 4-pin PWM input of the second fan. Repeat this process for subsequent fans. This allows all connected fans to be controlled by a single PWM signal from the motherboard.
- Ensure all connections are secure.

Image: Three ARCTIC P12 Pro PST fans connected in a daisy-chain configuration, illustrating the Power Sharing Technology (PST) for simplified cable management.
Operating Instructions
The ARCTIC P12 Pro PST fans are controlled via a 4-pin PWM signal, offering precise speed adjustment and an intelligent 0 RPM mode.
- PWM Control: The fan speed can be dynamically adjusted by your motherboard or fan controller based on temperature readings. The speed range is 600 to 3000 RPM.
- 0 RPM Mode: When the PWM signal drops below 5%, the fan will stop spinning completely. This feature allows for silent operation during low-load scenarios, conserving power and reducing noise. The fan will automatically resume operation when the PWM signal increases.
- Airflow Direction: Ensure the fans are oriented to provide the desired airflow (intake or exhaust) for your system's cooling strategy.
Maintenance
Regular maintenance helps ensure optimal performance and longevity of your fans.
- Dust Removal: Periodically inspect the fan blades and frame for dust accumulation. Use compressed air or a soft brush to gently remove dust. Avoid using excessive force or liquids.
- Cable Management: Ensure fan cables are neatly routed and secured to prevent interference with moving parts or other components.
Troubleshooting
If you encounter issues with your ARCTIC P12 Pro PST fans, consider the following:
- Fan Not Spinning:
- Check all 4-pin PWM connections to the motherboard and between daisy-chained fans.
- Verify that the motherboard's BIOS/UEFI settings or fan control software are configured correctly and providing a sufficient PWM signal (above 5% for operation).
- Ensure no cables or obstructions are preventing the fan blades from rotating.
- Excessive Noise:
- Check for loose mounting screws; tighten them evenly.
- Ensure no cables are touching the fan blades.
- Adjust fan speed settings in your motherboard's BIOS/UEFI or fan control software to a lower RPM if noise is a concern at higher speeds.
- Inspect for any foreign objects caught in the fan blades.
Specifications
Detailed technical specifications for the ARCTIC P12 Pro PST 120mm PWM Fan:
| Feature | Specification |
|---|---|
| Product Dimensions | 4.7"L x 4.7"W x 1"H (120 x 120 x 25 mm) |
| Item Model Number | ACFAN00307A |
| Brand | ARCTIC |
| Power Connector Type | 4-Pin PWM |
| Voltage | 12 Volts |
| Wattage | 3.96 watts |
| Cooling Method | Air |
| Compatible Devices | Desktop Computers |
| Material | Plastic |
| Maximum Rotational Speed | 3000 RPM |
| Air Flow Capacity | 77 Cubic Feet Per Minute (CFM) / 131 m³/h |
| Static Pressure | 6.9 mmH₂O |
| Bearing Type | Fluid Dynamic Bearing (FDB) |

Image: Visual representation of key fan specifications including fan speed (600-3000 RPM), static pressure (6.9 mmH₂O), and airflow (77 CFM).

Image: A P/Q (Pressure/Flow) curve graph illustrating the performance characteristics of the P12 Pro fan compared to the P12 PWM PST, showing static pressure against airflow.
Warranty Information
ARCTIC products are covered by a manufacturer's warranty. For specific warranty terms, conditions, and duration, please refer to the official ARCTIC website or the warranty card included with your product. Keep your proof of purchase for warranty claims.
Support
For further assistance, technical support, or frequently asked questions, please visit the official ARCTIC support website:





