ARCTIC
ARCTIC P12 Slim PWM PST - PC Fan, 120 mm Fan, Pressure-optimised
Bottom line: The ARCTIC P12 Slim PWM PST ($8.23 on Amazon as of 2026-10-06): 15 mm height fits SFF cases where a 25 mm fan will not; main trade-off: 34.51 cfm airflow trails full 25 mm 120 mm fans.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ 15 mm height fits SFF cases where a 25 mm fan will not
- ✓ 1.33 mmH2O static pressure targets radiators and heat sink fins
- ✓ Wide 200-2100 RPM PWM range for near-silent idle
- ✓ PST daisy-chaining runs multiple fans off one 4-pin header
Cons
- ✗ 34.51 cfm airflow trails full 25 mm 120 mm fans
- ✗ 0.3 sone rating still audible near the 2100 RPM ceiling
- ✗ Slim frame limits use as a general high-airflow intake
- ✗ PST chaining ties all linked fans to one PWM curve
Manufacturer description
The ARCTIC P12 Slim PWM PST is a 120 mm pressure-optimised case fan built for builds where a standard 25 mm fan simply will not fit. At just 15 mm thick, it clears the tight clearances in small form factor cases, low-profile CPU coolers, and sandwich-layout enclosures while still pushing 34.51 cfm (58.62 m3/h) of airflow at 1.33 mmH2O of static pressure. That pressure focus is the point: ARCTIC tuned the P-series blade geometry and motor so the fan keeps moving air through the dense fin stacks of heat sinks and the tight fin pitch of AIO radiators, not just across open case space. The 4-pin…
SpecPicks Verdict
SpecPicks scored ARCTIC P12 Slim PWM PST using a rating × review-volume × price-fit model applied to published specs and reviews across the cooling & fans category. ARCTIC's cooling & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for cooling & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Will the ARCTIC P12 Slim fit my small form factor case?
It has a 15 mm installation height instead of the usual 25 mm, so it fits mounts where a standard 120 mm fan does not. Confirm your case lists a 120 x 120 x 15 mm slim fan position.
Is this fan good for a radiator or a CPU heat sink?
Yes. It is pressure-optimised at 1.33 mmH2O static pressure, which ARCTIC designed specifically for use against the airflow resistance of heat sinks and radiators.
How quiet is the P12 Slim PWM PST?
ARCTIC rates it at 0.3 sone. The 4-pin PWM connector lets your motherboard scale it anywhere from 200 to 2100 RPM, so it runs much quieter than its rated maximum at idle.
What does PST mean on this fan?
PST is PWM Sharing Technology: the fan carries a pass-through connector so you can daisy-chain additional ARCTIC fans to one motherboard 4-pin header and control them together.
How much air does it actually move?
ARCTIC specifies 34.51 cfm (58.62 m3/h) at full speed. That is lower than a 25 mm fan of the same diameter, which is the expected tradeoff for the slim 15 mm frame.
Key Features
- OPTIMISED FOR STATIC PRESSURE: Through high static pressure, the fan guarantees efficient cooling, even with increased air resistance. Suitable for use on heat sinks and radiators
- STRONG COOLING PERFORMANCE: The performance of the P fans has been noticeably increased through numerous improvements, including upgraded engine technology and a newly developed fan design
- 300 TO 2100 RPM: Thanks to the 4-pin connector, the fan speed can be controlled via PWM PST. This keeps noise to a minimum while at the same time ensuring maximum cooling performance
- LOW INSTALLATION HEIGHT: The P12 Slim PWM PST has an installation height of only 15 mm, making it suitable for small form factor cases & for installations for which a 25 mm fan does not fit
- TECHNICAL DATA: Fan speed: 200–2100 rpm, Airflow: 34,51 cfm | 58,62 m³/h, Noise Level: 0.3 Sone, Static Pressure: 1.33 mmH₂O, Pin: 4-pin
Full Specifications
| Brand | ARCTIC |
|---|---|
| Model | ACFAN00187A |
| Voltage | 12 volts_of_direct_current |
| Wattage | 1.44 watts |
| Material | Polycarbonate |
| Unit Count | 1 Count |
| Noise Level | 0.3 sones |
| Part Number | ACFAN00187A |
| Compatibility | PC |
| Material Type | Polycarbonate |
| Cooling Method | Air |
| Item Type Name | ARCTIC P12 SLIM PWM PST Case Fan |
| TECHNICAL DATA | Fan speed: 200–2100 rpm, Airflow: 34,51 cfm | 58,62 m³/h, Noise Level: 0.3 Sone, Static Pressure: 1.33 mmH₂O, Pin: 4-pin |
| Number of Items | 1 |
| Air Flow Capacity | 42.1 cubic meter per hour |
| Compatible Devices | Desktop |
| Included Components | P12 SLIM PWM PST |
| Power Connector Type | 4-Pin |
| Warranty Description | 6 years |
| Maximum Rotational Speed | 2100 rpm |
Ready to buy?
ARCTIC P12 Slim PWM PST - PC Fan, 120 mm Fan, Pressure-optimised is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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