Noctua NF-A20 PWM, Premium Quiet Fan, 4-Pin (200x30mm, Brown)
Bottom line: The Noctua NF-A20 PWM: 800 RPM ceiling and 18.1 dB(A) max keeps a 200mm fan genuinely quiet; main trade-off: 30mm thick, deeper than many stock 200mm fans - measure clearance first.
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Pros & Cons
Pros
- ✓ 800 RPM ceiling and 18.1 dB(A) max keeps a 200mm fan genuinely quiet
- ✓ 4-pin PWM lets the motherboard ramp it down to near-silent at idle
- ✓ Three mount patterns: 154x154, 170x170, and 110x180mm
- ✓ Ships with y-cable to run two PWM fans off one header
Cons
- ✗ 30mm thick, deeper than many stock 200mm fans - measure clearance first
- ✗ 200mm diameter rules out standard 120/140mm fan mounts entirely
- ✗ 800 RPM cap limits static pressure for dense radiators or filters
- ✗ Noctua brown-and-tan colorway clashes with blacked-out builds
Manufacturer description
The Noctua NF-A20 PWM is a 200x200x30mm case fan built for builders who want serious airflow without the drone that usually comes with big-diameter fans. Its A-series frame pairs Flow Acceleration Channels with Noctua's Advanced Acoustic Optimisation, so the fan tops out at 800 RPM and 18.1 dB(A) while moving the volume of air only a 200mm blade can. Four-pin PWM control lets your motherboard throttle it down to near-silence at idle, and the bundled Low-Noise Adaptor drops the ceiling further if your case still hums. Three mounting-hole patterns (154x154, 170x170, and 110x180mm) cover most…
SpecPicks Verdict
SpecPicks scored Noctua NF-A20 PWM using a rating × review-volume × price-fit model applied to published specs and reviews across the PC & gaming hardware category. Noctua's PC & gaming hardware 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 PC & gaming hardware 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
How loud is the Noctua NF-A20 at full speed?
Noctua rates it at a maximum 18.1 dB(A) at its top speed of 800 RPM. The included Low-Noise Adaptor reduces it further, and 4-pin PWM control lets your motherboard drop the RPM at idle.
Will the NF-A20 fit my case?
It is 200mm in diameter (7.8 inches) and 30mm thick (1.18 inches), which is thicker than many stock 200mm fans. It offers three mounting-hole patterns - 154x154, 170x170, and 110x180mm - so measure both the hole spacing and the depth clearance before ordering.
What comes in the box with the NF-A20?
Noctua includes anti-vibration mounts, fan screws, a Low-Noise Adaptor, an extension cable, and a y-cable that runs two PWM fans from a single motherboard header.
Is the NF-A20 a 3-pin or 4-pin fan?
It is a 4-pin PWM fan running on 12V, so your motherboard can vary its speed dynamically between idle and its 800 RPM maximum rather than running it flat out.
How long is the NF-A20 rated to last?
Noctua rates it at greater than 150,000 hours MTTF. For the specific warranty period and terms that apply to your purchase, check the current product listing.
Key Features
- Premium quiet fan, 200x200x30 mm, 12V, 4-pin PWM, max. 800 RPM, max. 18.1 dB(A), >150,000 h MTTF
- ATTENTION: 200mm diameter (7.8 inches) and a thickness of 30mm (1.18 inches). Please make sure you have sufficient space in your case.
- Award-winning A-series design with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
- Large 200mm diameter for high airflow performance at extremely low noise levels, three sets of mounting holes (154x154, 170x170 & 110x180mm)
- Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and y-cable for running two PWM fans on the same header
Full Specifications
| Brand | Noctua |
|---|---|
| Model | NF-A20PWM |
| Voltage | 12 Volts |
| Material | Fibre-glass reinforced PBT |
| ATTENTION | 200mm diameter (7.8 inches) and a thickness of 30mm (1.18 inches). Please make sure you have sufficient space in your case. |
| Dimensions | 200x200x30 mm |
| Unit Count | 1.0 Count |
| Noise Level | 18.1 Decibels |
| Part Number | NF-A20PWM |
| Material Type | Fibre-glass reinforced PBT |
| Cooling Method | Air |
| Item Type Name | Fan |
| Number of Items | 1 |
| Vibration/Rumble | Yes |
| Air Flow Capacity | 146.9 Cubic Meters Per Hour |
| Compatible Devices | Desktop |
| Included Components | 1 Piece |
| Power Connector Type | 4-Pin |
| Warranty Description | 6 year manufacturer’s warranty |
| Maximum Rotational Speed | 800 RPM |
Ready to buy?
Noctua NF-A20 PWM, Premium Quiet Fan, 4-Pin (200x30mm, Brown) 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.
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