Description
ARCTIC P12 Pro Reverse PWM 120mm Chassis Fan
ACFAN00331A
The ARCTIC P12 Pro Reverse (ACFAN00331A) is a specialised 120 mm PWM cooling fan designed with a reversed airflow direction, meaning it pulls air from the fan’s back side rather than pushing it in the usual orientation — a useful design when airflow direction matters for aesthetics or installation constraints.
Featuring a wide PWM-controlled speed range from 500 RPM up to 3000 RPM, this fan can adapt from quiet, low-speed operation to strong airflow when your system’s cooling demand increases. The aerodynamic blade and frame design helps reduce turbulence and noise while maintaining effective airflow even in moderately restrictive environments like mesh panels or minimal clearances.
The fluid dynamic bearing supports smoother rotation and lower noise levels compared to standard sleeve bearings and is built for longevity, making this fan an excellent fit for both custom builds and continuous-operation systems. A daisy-chain-ready connector allows multiple fans to be controlled synchronously via a single motherboard header.
Why It’s a Great Choice
Reversed-Airflow Design for Flexible Builds:
Most standard fans push air in one direction. This fan’s reversed airflow lets you draw air in from the back side — ideal for cases with unconventional layouts or where front-facing intake isn’t ideal.
Wide PWM Control Range:
The 500 – 3000 RPM PWM range lets the fan run quietly during light workloads and ramp up when temperatures rise, balancing acoustics with cooling performance.
Effective Air Movement:
With ~73 CFM airflow and ~4.5 mm H₂O static pressure, this fan delivers reliable performance for intake roles and can still handle some resistance from mesh filters or case panels.
Durable & Quiet Operation:
The fluid dynamic bearing reduces noise and extends fan life — a good choice for 24/7 operation in desktops, servers, or workstation builds.
Daisy-Chain Support for Multi-Fan Setups:
The additional PWM socket lets you daisy-chain multiple fans on a single motherboard PWM header, simplifying cable management and synchronized speed control.
Long Warranty Confidence:
Backed by ARCTIC’s 6-year warranty, demonstrating confidence in durability and long-term performance.
Specifications:
| Specification | Details |
|---|---|
| Brand | ARCTIC |
| Model / SKU | P12 Pro Reverse (ACFAN00331A) |
| Fan Size | 120 × 120 × 27 mm |
| Speed Range | 500 – 3000 RPM (PWM controlled) |
| Airflow | ~73 CFM / ~124 m³/h |
| Static Pressure | ~4.5 mm H₂O |
| Bearing Type | Fluid Dynamic Bearing |
| Connector | 4-pin PWM + 4-pin socket (daisy-chain) |
| Voltage / Current | 12 V DC • ~0.4 A |
| Start-up Voltage | ~3.5 V DC |
| Operating Temp. | 0 – 40 °C |
| Colour | Black |
| Weight | ~172 g |
| Warranty | 6 Years |
| Use Case | Reverse airflow cooling, case intake spots, aesthetic airflow adjustments |






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